>This sounds like a DCOM permissions issue. One possibility is that the Access Permissions are not set the same as the Launch Permissions for your server application in DCOMCNFG.
>
>Another possibility is the Default DCOMCNFG access and launch permissions are not set properly. For some reason, this is required even if your application has its own settings.

There was some trouble (a missing file) when I first ran the configure server wizard. I re-ran it and it's happy now :).

Thanks