The VFP .DLL doesn't run under your account. It runs under whatever account your Web app is running. Check the rights for that account. It would also help with troubleshooting if you add error handling to your DLL with COMRETURNERROR() to return the error info.

>I have just moved a DOT Net c# Web App from one server to another.
>The web app contains a vfp .DLL do do some file accessing
>All bits of the Web app are working, excelpt the VFP .dll
>Following message is comng up when I call a method in the DLL
>..System.Runtime.InteropServices.ComException
>...The Server thre an exception
>...Exception form HResult 0x80010105 (RPC_E_SERVERFAULT)
>I have registered the DLL on the new server and am logged in with Admin Rights
>