Authentication with DIGEST-MD5 or CRAM-MD5

[Nicolas Fontaine]

Hi everybody,
    I'm new to this mailing list and also new to cyrus sasl. I'm trying 
to setup a IMAP server based on the IMAP Aggregator with two machines (A 
Front End with a Mupdate master on it and a Backend with mailbox)... All 
seems to works fine : I've got the synchronisation between the mupdate 
slave and the mupdate master, and I can create new mailbox to user.
    But my problem is when I want to read my mail via the front end, the 
connection between the front end and the backend failed (with the 
proxing user Murder). All is configured with sasldb with PLAIN /LOGIN 
authentication with saslauthd deamon. It seems that I need to set up 
sasl to use the mechanism DIGEST-MD5 or CRAM-MD5. But I can't create a 
DIGEST-MD5 password with saslpasswd2...

So, my question is : How can I store my password in sasldb2 with 
DIGEST-MD5 or CRAM-MD5 ?

Thanks a lot, and I'm sorry for my poor english...