The most likely cause of this error is that the DCOM server is not registered or has been deleted. Reregister the Rrasprxy.dll ...

The most likely cause of this error is that the DCOM server is not registered or has been deleted. Reregister the Rrasprxy.dll (run Regsvr32 Rrasprxy.dll) and check that Remrras.exe is located in the same folder as Rrasprxy.dll.