I'm having a user that keeps getting the error message..

"Failed Authenticating User

The VPTunnel driver returned an error"

This PC was working a while ago and all of a sudden stopped working (per the
user). It's a Windows XP Professional PC that seemed to install the SP2
serice pack already. We've also tried to re-install the VPN client with no
luck fixing the problem.

Any other ideas? The VPN works with other users.

Thanks in advance.