See KXRPC - Everything you wanted to know about KXRPC
Make sure the service is actually running on all domain controllers, you'll need to install it as a service. Make sure that the cleitn DLLs are all up-to-date and that there's no version conflict.
If you specify a specific RPC server then you might need to use a FQDN in an AD environment since Windows 9x relys on correct WINS information.
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There are two types of vessels, submarines and targets.
