ouch ... Communique 4... Are you using contentbus or CRX?
When you use contentbus, I would check the file representing the handle for a user with a known password, copy the crypted password from there and then insert it at the location where the crypted password of the admin is stored. Never dealt with Communique 4 and CRX.
It's been about 8 years since I dealt the last time with it, so I forgot most of the details.
Jörg