Moodle side authentication problem

I installed the plugin on Joomla 1.5.15 when I do authentication on joomla everything is ok and can access the moodle, but when I try and moodle authentication only (without using the login form joomla) can not log into moodle.
The encrypted password in the dbase joomla is different from that which is recorded in moodle.
May be some configuration utf?
Thanks in advance

Hi. Joomdle users can not enter to Moodle directly.
They always have to go through Joomla first to authenticate, as Moodle can only have one auth type, and this is Joomdle.

Hope this helps.

Antonio