Need help with joomdle 0.7, Joomla 1.5 and Moodle 2.1

I am getting some troubles trying to use joomdle with Moodle 2.1

I followed the instructions; when asking for System Health on Joomla, everything is OK except for the last item (in spanish: Servicios Web de Joomdle) which appears with an X and the text "La función solicitada no está disponible "

Looking for what can be wrong, I tried to configure joomdle on Moodle 2.1, but I don´t find it under Admin-Plugin-Authentication. The only similar entry is "Web services" but when I try to configure it, I get a message telling it should be done only for users with web services access. So I logged in as my dedicated web-services user in moodle, but then I have no admin rights.

What should I do?

Thank you!! I have the feeling that I am really close, but missing some point!

Sorry!! I missed the joomdle entry on the authentication services. I enabled it, added all the functions to joomdle, and now I don´t get this error.

There is still something I don´t understand: in Joomla, I can see which users have a Joomla account, a Moodle account and(or a joomdle account.

When I create a user in joomla, a moodle account is automatically created AND the user is marked as joomdle user.
Then, I can log in to MOODLE with this user but NOT WITH JOOMLA, as if the fact that the user is marked as a "joomdle user" was preventing from a regular login in joomla.

Can somebody explain what is going on?

Thank yoU!!!