Or maybe I don't need a CPP. According to Microsoft's info at http://support.microsoft.com/kb/283185, if I'm setting cookies and reading them back on the same site, it seems that everything should go through fine.
I've been trying to find something to point the finger at regarding issues I've had with people not staying logged in in Internet Explorer. When certain users log in (which starts a session and saves their user id in the session) and then when they switch to another page (which checks for their user id in the session) they get booted. They have cookies enabled, and can stay logged in fine in Firefox. Personally I suspect some kind of glitch in their system, but if it's keeping out more than one visitor I want to track it down and fix it.
Any suggestions?