I had the VPN Client 3.6.3 working fine on my WinXP Pro laptop but decided to upgrade it to 3.6.4. Unfortunately during the process I have now got stuck in an error loop. I am unable get the Deterministic Network Enhancer to either work or uninstall. I get an error that says "Remove Plugin failed" followed by ERROR 1722. I cannot get the client to uninstall or re-install.