SSAS (2k5) named instance double-hop issue

Hi everyone

We have a Webapplication that needs to access a cube (SSAS) on a remote server. The remote server hosts multiple named SSAS instances (dev, test).

So here we go, double-hop as we know it. I configured AD/IIS/SSAS according to

http://support.microsoft.com/kb/917409/en-us and

http://www.mosha.com/msolap/articles/kerberos_delegation.htm

I was able to create the SPNs for the named instances (I can see them using "-L" with setspn.exe), but they do not show up in the window I use to configure delegation. I can only see the SPN for the default instance of SSAS (if there is any) there. I think this is part of the issue.

The trouble is that I keep getting "An existing connection was forcibly closed by the remote host "-errors. And I think that ...