Not sure...IIS is an area where I know the basics but not much beyond. I know that in ASP.NET some things are cached - whether that would be affected by rights, I'm not quite sure.
Sorry I can't give you a good answer, but Danny or someone else might be able to.
I found an old message (Message #
800063 - not sure if it will help).
Can you paste the exact error message you're getting? (I know it was logon failed...just curious if it contained anything else).
Kevin