Ok, I made some progress. I found that because the two servers have different urls I should set the cookie domain to the domain and that way they can be different subdomains ok.
That seems to be working. I now only get one session with the same session ID. The trouble I am having now is that with the adodb sessions I cannot retrieve the data from the previous server. It's in the db, and I can see it. I just get an empty array.
Any ideas as to what else I might be missing?
Thanks