jQuery FullCalendar not showing data

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VB

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jQuery FullCalendar not showing data for only one user and same code work fine for other users.

I have bind the data from code-behind. Every functionality i have checked.
Main problem is that
code runs for multiple users but not working for single user.

My jquery function:-

$(document).ready(function() {
            
            var date = new Date();
            var d = date.getDate();
            var m = date.getMonth();
            var y = date.getFullYear();
            $('#calendar').fullCalendar({
                
                showTime: true,
    	        theme: true,
    	        defaultView:'agendaDay',
    	        header: {
    	        
    		        left: 'prev,next, today',
    		        center: 'title',
    		        right: 'month,agendaWeek,agendaDay'
    	        },	
    	        editable: false,
    	        draggable: false,
    	        selectable: true,
                selectHelper: true,	  
    
                         eventClick: function(calEvent, jsEvent, view) {
                                   calEvent.dblclick(function (ev)
                                {
                                    return view.trigger('dblclick', this, event, ev);
                                })   
                        },
                         eventElementHandlers: function (event, eventElement)
                            {
                                var view = this; 
                                eventElement
                                .click(function (ev)
                                {
                                    if (!eventElement.hasClass('ui-draggable-dragging') &&
                                        !eventElement.hasClass('ui-resizable-resizing'))
                                    {
                                        return view.trigger('eventClick', this, event, ev);
                                    }
                                })
                                .dblclick(function (ev)
                                {
                                    
                                    return view.trigger('dblclick', this, event, ev);
                                })
                                .hover(
                                    function (ev)
                                    {
                                        view.trigger('eventMouseover', this, event, ev);
                                    },
                                    function (ev)
                                    {
                                        view.trigger('eventMouseout', this, event, ev);
                                    }
                                );
                            },
                             eventRender: function(event, element) {
                             
                               element.bind('dblclick', function() {
                                $("#dialog").dialog('open');
                                if (calEvent.url) {
                                        window.open(calEvent.url);
                                        return false;
                                      }
                                    //element.find(".fc-event-title").html(event.title + ": <span>" + event.description + "</span>");
                                alert('double click!');                         
                            });
                            }
        //            dayClick: function (date, allDay, jsEvent, view) { 
        //                  $("#dialog").dialog('open');
        //                }      
                });`for today button click`
                $('.fc-button-today span').click(function(){ 
                    var action="today";
                    var view =  $('#calendar').fullCalendar('getView');
                    var strView = view.name;
                    var date = new Date();
                    var strStartDate = $.fullCalendar.formatDate(date, 'yyyy-MM-dd');
                    window.location.href="../Menu/Calendar.aspx?startCaldate=" + strStartDate + "&action=" + action + "&view=" + strView;
                 });
    for previous button click
               $('.fc-button-prev span').click(function(){ 
                    var action="prev";
                    var view =  $('#calendar').fullCalendar('getView');
                    var strView = view.name;
                    var loadStartDate = view.start;
                    var strStartDate = $.fullCalendar.formatDate(loadStartDate, 'yyyy-MM-dd');
                    var loadEndDate = view.end;
                    var strEndDate = $.fullCalendar.formatDate(loadEndDate, 'yyyy-MM-dd');
                    window.location.href="../Menu/Calendar.aspx?startCaldate=" + strStartDate + "&action=" + action + "&view=" + strView + "&endCaldate="+ strEndDate;
               });
               $('.fc-button-next span').click(function(){            
                    var action="next";
                    var view =  $('#calendar').fullCalendar('getView');
                    var strView = view.name;
                    var loadStartDate = view.start;
                    var strStartDate = $.fullCalendar.formatDate(loadStartDate, 'yyyy-MM-dd');
                    var loadEndDate = view.end;
                    var strEndDate = $.fullCalendar.formatDate(loadEndDate, 'yyyy-MM-dd');
                    window.location.href="../Menu/Calendar.aspx?startCaldate=" + strStartDate + "&action=" + action + "&view=" + strView + "&endCaldate="+ strEndDate;
                });
                 $('#my-button').click(function() {
                     var d = $('#calendar').fullCalendar('getDate');
                     alert("The current date of the calendar is " + d);
                    });
                $("#dialog").dialog({
                    autoOpen: false,
                    height: 350,
                    width: 700,
                    modal: true,
                    buttons: {
                        'Create event': function () {
                            $(this).dialog('close');
                        },
                        Cancel: function () {
                            $(this).dialog('close');
                        }
                        },
                        close: function () {
                        }
                });
            });
    
        function showDate(date,month,year,viewName){
           
            $('#calendar').fullCalendar( 'changeView', viewName );
            $('#calendar').fullCalendar( 'gotoDate', year, month, date);
        }  
         
        // javascript for adding db events in calendar
        function addEvents(myid,mytitle, startDate, endDate, url, color) { 
        
        //$('#calendar').fullCalendar( 'removeEvents', [2]);
        var source1 = {
        events: [
        {
            id: myid,
            title: mytitle,
            start: startDate,
            end : endDate,
            url : url,
            allDay: false
        },
        ],
        color: color,   // an option!
        textColor: 'black' // an option!
        
       };
        $('#calendar').fullCalendar('addEventSource', source1);
        $('#calendar').fullCalendar('refetchEvents');
    }