I can almost guarantee which step has been missed.
With Distributed.net, you have to complete & return at least 1 work unit via their client for their stats server to pick you up & complete the creation of your account.
"You need to run the Dnet RC5 client for a few cycles so that a result is posted & the Dnet stats server sets you up correctly."
After that you can then modify it and join the team.
The steps are in the instructions posted earlier:
http://www.amdusers.com/forum/showth...nt-integration