Logon Wondow 2000

Hello,
I am running Window 2K at home. I try to logon the network with domain using Checkpoint VPN. At the logon screen when i put my password it took it after awhile; without saying that “the Domain you try to loggon is not Available …..” i’m thinking that it’s using CACH file to remember my profile and password. How do i disable that option? so i will get a promp wit an error “Domain is not available” when i put in my passwrod.
Thank you very mucho…..