WMI Access Denied Issue

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C#

I am getin "Access is denied" exception while,
tryin to run a PROCESS on REMOTE MACHINE... User Credentials given


Using C#, WMI, Details about the code,

object[] theProcessToRun = { "calc.exe" };
ConnectionOptions theConnection = new ConnectionOptions();
theConnection.Username = "chester";
theConnection.Password = "";
ManagementScope theScope = new ManagementScope("\\\\" + "192.168.10.15" + "\\root\\cimv2", theConnection);
theScope.Connect();  // TO PUT THIS OR NOT ???
ManagementClass theClass = new ManagementClass(theScope, new ManagementPath("Win32_Process"), new ObjectGetOptions());
theClass.InvokeMethod("Create", theProcessToRun);

Whether to PUT theScope.Connect(); ?