gmail calendar invite for ics file not working properly

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I have an ics file which is used to schedule appointment.I am sending that appointment details to my gmail with template and an attachment of .ics file.my issue is iam not getting Rsvp events and when,where,who agenda sort of fields are not diplaying.


http://www.engadget.com/2013/03/13/add-gmail-calendar-attachment-gcal-events/[^]


displaying some sort format like above link page

I am trying to get the output like with Rsvp buttons,yes,maybe,no,agenda etc fields like below page

http://stackoverflow.com/questions/23651846/gmail-calendar-invite-from-ics-not-rendering-properly[^]

here is my code for ics file

BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 9.0 MIMEDIR//EN\n
VERSION:2.0
METHOD:REQUEST
BEGIN:VEVENT
ATTENDEE;CUTYPE=INDIVIDUAL;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=Tarun kumar;X-NUM-GUESTS=0:mailto:tarun.cloucom@gmail.com ORGANIZER:mailto:a6tarun@gmail.com
DTSTART:20140130T191500
DTEND:20140130T194500
LOCATION:Hyderabad
TRANSP:OPAQUE
SEQUENCE:0
UID:8f5a0777-bf6d-17d2-f14a-52e7feedf810
DTSTAMP:20140129T144300
DESCRIPTION:Hie
SUMMARY:how are you
PRIORITY:5
X-MICROSOFT-CDO-IMPORTANCE:1
CLASS:PUBLIC"BEGIN:VALARM
TRIGGER:-PT15M
ACTION:DISPLAY
DESCRIPTION:Reminder
END:VALARM
END:VEVENT
END:VCALENDAR