cyradm : Auth problem..

[jb]

Hello ... .AGAIN ..

Im following the install-instructions included in the source.

now im stuck again.. i can't login via cyradm .

When i try : cyradm localhost

it whats a password, for some user, guess it's jb, because it returns this 
error message:

Login failed: generic failure at 
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi/Cyrus/IMAP/Admin.pm 
line 118
cyradm: cannot authenticate to server with  as jb

what did i miss now ?