Object variable not set

[programmer1111]

when i invoke the my COM dll(VB) i am getting the error Object variable or With block variable not set.Follwing libraries have been included..
MTS library
COM+ service library
Microsoft Active Server Page Objeect Libray
plus ordinay refrences


The Actual code is

On Error GoTo ErrHandler

Dim ErrorMsgs As ErrObject

Dim objMtsCtx As ObjectContext
Dim oSession1 As Session

Set objMtsCtx = GetObjectContext()

If objMtsCtx Is Nothing Then
OutputDebugString vbCrLf & "failed............ "
End If

OutputDebugString vbCrLf & "not failed............ "

oSession1("New&quot = "Praveen"

Exit Function

ErrHandler:
OutputDebugString (ErrorMsgs.Description)

can any one tell me what could be the problem....treat this as very urgert.pls reply me ASAP

regards
Praveen