Remote debugging - Walter Sobchak

I'm trying to remote debug an isapi filter.
My computer is windows xp sp2, and the remote computer is win 2003
enterprise.The remote computer is a domain controller in a different domain.
After I run msvsmon.exe on the remote machine and configure that anybody
can connect to debug I successfully attach to the inetinfo.exe process
but the execution doesn't stop on my breakpoints.
I copied the whole debug folder including the .pdb file.
The firewall is set up correctly.

Any ideas why doesn't this work?