I am using BAM! as project manager and the Collatz Conjecture project was previously on my projects list. The project went down no long ago because of some technical difficulties and it came back up some time after that, at which time I started to get some messages in the Notices area of the BOINC Manager stating that the manager cannot contact the project because of an invalid code signing key, suggesting detaching the host from the project and then attach the project back. So I detached all my hosts from the project and then I removed the project from the project list. Now when I try to sign up for the project (search for my existing account), the project is listed as “Project down”, even if the server status of the Collatz project says is up and running. Is there a way to reattach the project back to my projects list in BAM!?

Collatz goes off and on so often, it's not even funny. Judging by the post date, I'd say it'll sort itself out.