Yes,
Using a index.asp with just this code should work:
<%
response.redirect("default.asp")
%>
Make sure there is nothing else in that file but the code above.
Also found your problem.
It has to do with the url you are using. The default cookiesetting is "Forum"
That means it uses the path to your forum to make the cookie unique for that path.
It didn't like that, probably because of the ~
I've set the cookiemode to "Website" (in the admin options) and was able to logon after that.
Pierre
Join the Snitz WebRing