VPN Connects, No Folder Share.

I use VPN through XP PRO (PC1). It used to work. I used to connect into a computer and access the drives I mapped. Now, for some reason, I can access the computer, but no longer can access the drives by any means I know of. Can not access it through //pcname or the map drives I made. I connect but can not access folders or drives. Says link is invalid.

VPN on another PC can access those drives fine. So it is a problem with PC1.

Is there some way to repair the VPN on PC1 to access the drives again?

Thank you.