OK. I'm suggesting that you reinstall your vpn client. Before you do this, let's do a system first to make sure we don't lose anything. If you don't know how to do a system restore:
Through the All Programs menu:
1. Click Start.
2. Point to All Programs.
3. Point to Accessories.
4. Point to System Tools.
5. Click System Restore.
6. Follow the instructions on the wizard.
Creating a restore point can be useful any time you anticipate making changes to your computer that are risky or might make your computer unstable. If something goes wrong, you select the restore point you just created and Windows XP undoes any system changes made since that time.
Create a Restore Point (note: creating a restore point will require your pc to be restarted afterwards)
1. Open System Restore. (See step-by-step instructions above.)
2. Click Create a restore point, and then click Next.
3. In the Restore point description box, type a name to identify this restore point. System Restore automatically adds the date and time that this Restore Point is created.
After creating the restore point, uninstall your vpn client and reinstall it.