Session

I'm setting up 2 websites for a friend of mine, en I'm have problems with
one of the sites.The situation: I have 2 different domains (both in the .NL domain). Both
domains provides the possibility for users to log in. The loginscript and
the databases are hosted at server 1. The site at server 2 contains a link
to the loginpage at server 1. That works well... so far.
The problem is that when I log in at server 2, he doesn't accept it. I found
out that the Session variable I use isn't recognised. I use
Session("protected") to keep track of the users who are logged in. When
there credentials are right according to the database,
Session("protected")=True and the loginpage gives a redirection to
partner.asp by doing Response.Redirect "partner.asp". Trying to log in from
server 1 works fine, trying to log in from server 2 doesn't.
My questions therefore are:
1. Is the Session variable rememberd by server 2 (although server 1 contains
the loginpage en gives a redirection to a page on server 1)
2. What can I do to correct this problem?
Your answers are appreciated, and sorry for the possible worse language in
this message (English is not my native language ;))