proftpd Problem

[fulltilt]

i'm going crazy ...

The Mail is working now after migration.
But the Problem is proftpd user id's in Database are differnt like in passwd.
If i change the user in passwd the mail users did not work.

Is there's a way to update ftp_users table with users from /etc/passwd?
Maybe a script from ispCP or another script that reads from passwd and change users in table ftp_users ...