Domain resources not available after VPN disconnection on Win7 machine

Hi all,

I have been frustrated with this for years and never really taken the time to find out why, so now I want to find out why and hopefully how to fix without logging out and in to Windows again!

This is really a domain related issue more than a Windows 7 issue, but I thought it suited this forum better due to the solution being required on the PC.

I frequently VPN to remote sites using a variety of VPN clients. After disconnection from the remote site using some VPN clients, I can no longer access local domain resources. Network connectivity is not an issue, but accessing the resource on the domain is, i.e mapped drives.
If I log out and in again things start working again.

Does anyone have any thoughts?

ps I had the same issue with XP.