Session problems

Question

I am having a strange problem which I think has to do with the session. I am developing an ASP.NET web application using VisualStudio.net. The developing is done on a Windows XP machine, the live site is on a Windows 2000 standard server machine. The problem is that on the Windows 2000 machine session variables seem to get mixed up or lost, while on the XP machine everything works as it is supposed to be. Both machines are equally configured (to my knowledge) and both machine use out of process session state (aspnet_state.exe).