Error running vadddomain

[Michael Blood]

        
when attempting to run ./vadddomain  I enter a password twice and then i
receive the following error.

qmail-newu: fatal: bad format in users/assign

Why would it do this?  I have done everything I can think of "Including"
clearing out the assign file and starting with a blank file.  I still get
the same error.

Any Help would be appreciated,

Thanks
Michael