Urgent: Intermittent Runtime Error 70 (Client on XP and Server on NT)

I am currently working on an apllication written in Visual Basic 6.0. The server part of the application (VB6, DCOM) is installed on Windows NT and the clients are installed on Windows XP. To make it more complicated, the NT servers  and the XP clients are on different domains (say NTD and XPD).

The system is in Production and normally works fine but intermittently the client fails to start "Runtime error 70 - Permission denied". It doesn't seem anything in the code but more to do with the way security on DCOM is setup or the way two domains interact with each other.

It's quite a critical problem and any help would be highly appreciated.

AnupamDGAsked:
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moduloConnect With a Mentor Commented:
PAQed - no points refunded (of 500)

modulo
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EDDYKTCommented:
Try the following

1. run your server as a specific user by using Dcomcnfg.
2. you may want to trust your domain from each other
3. read this
http://support.microsoft.com/default.aspx?scid=kb;en-us;183607
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EDDYKTCommented:
Also

If Computer A is not part of the same domain as Computer B, then Computer B needs an identical user account (that is, an identical login and password) or set the Default Authentication Level to None.

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