Team Password Not Working in MP League

[helseld]

An owner trying to get set up in the HFFL cannot get his team password to work. I've confirmed that he's doing everything correctly in the setup process, as confirmed by the fact that he's been able to set up a different team using that team's password. The password that's not working for this owner was successfully used by a previous owner.

Anyone experienced this, or have a suggestion as to how to resolve?