cyradm

I'm having a little trouble with the cyradm tool, firstly I'd like to point 
out that I'm only running Cyrus in a lab & am not that familiar at this 
point.

I'm authenticating using saslauthd -a pam, everything is working fine from 
an imap perspective, only imaps, using local acccounts, it's running on 
Redhat. Only issue is the cyradm tool won't connect to the local server.
I've tried, using the --auth switch with a whole load of permutations, 
unix,plain,pam,saslauth, tha man pages lists --auth[mechanism] without 
specifying the mechs explicitly.

My account is listed as an admin in /etc/imap.conf, put an entry in 
/etc/saslauthdb2 just in case, but am still having difficulties.

A quick rundown of how & what against this tool auths against would be most 
helpfull.

Thanks up front & apologies if this question's a little low-brow.

Daryl