Dynamic Permission - Session Variable

Hi,
I have the session variable for the "Static Permission," which I believe is (GroupID).
Can someone help me find the one for "Dynamic Permission?"
I am asking because I have set up an Access database that will allow users to register and depending upon there (Dynamic) group permissions, I want the user to be redirected to another page.
If someone logs in as an "Admin", I want them to go to "admin_list.asp" page and if they logon as anything else--I want them to be redirected to another page (default.html).
Here is the code I was using:
[codebox]if Session("GroupID") = "admin" then

Response.Redirect "admin_list.asp"

else

Response.Redirect "default.html"

end if[/codebox]
Please let me know what I am doing wrong.
phpnewbie