Remote access service problem

hi,

I have configured RAS on member server(2k sp2) and I have created policy to allow domain users to allow dial in. but when I tried to connect i get error 649. “The account does not have permission to dial in”.But I have assigned dial in permission to user.

in the server event log “The user failed an authenticatin attempt due to following reason.the user attempted to use an un authorised authentication method.
I tried microsoft site and tried all the solution but still Iam getting the error.

anybody help ???