COM object prevent MS Access from closing properly

I am running Microsoft Access 2010.  I am referencing a COM object in my VBA project.  This gives my application availability to DLL files that are used to update a proprietary system written in VB.Net.
The problem I am facing is that when I instantiate that object and then set it to nothing it is not removed from memory.  This causes Access not to shut down properly and I have to go to the Windows Task manager to close down Access.

Does anyone know of a work around to this so Access will close down correctly?  The way the COM objects is instantiated is as follows:

Public ASCRemote As ASC_Interface.ASCInterface

Public Sub Login(sUsrName As String, sPswd As String, sCompy As String, sAppwin As String)

    Set ASCRemote = New ASCInterface
    ASCRemote.DebugFlag = True
    ASCRemote.LogFileDir = "D:\ASCLOG"
    Call ASCRemote.Login(sUsrName, sPswd, sCompy, sAppwin)

End Sub

Public Sub Logout()

    Call ASCRemote.Logout(TempVars!strUserName, TempVars!strCompany, TempVars!strAppwin)
    Call ASCRemote.Dispose
    Set ASCRemote = Nothing

End Sub