CDO access in Asp.net

Has any one tried something like this from a web form ?

Public Function Logon() As Boolean
Dim objSession As New MAPI.Session()
Dim strProfileInfo As String
strProfileInfo = "exchangeserver" & vbLf & "name"
Try
objSession.Logon("", "", False, True, 0, True, strProfileInfo)
Return True
Catch ex As Exception
Return False
End Try
End Function

This function runs fine if executed in a windows application.(VB .net) or ASP

any restrictions of running CDO from ASP.net ,couldn't find any help on this in MSDN ?

thanks much,
</greygroove>