imapsycn problem

[marisu]

hello,all
I try to synchronize 2 servers (QMail --> Zimbra CS) with imapsync... and I have a problem with imapsync AUTH PLAIN...
Here's my command :

imapsync --syncinternaldates --host1 myhostSrc --host2 myhostDest
--user1 userLoginSrc --authuser1 adminLoginHostSrc --password1
passwordAdminHostSrc --authmech1 PLAIN --user2 userLoginDest --authuser2
adminLoginHostDest --password2 passwordAdminHostDest --authmech2 PLAIN
With the option authuser1, only the mails of the "admin" (authuser1) are synchronized and not those of the user "user1"...

Don't understand why... some help ?