Joomla 1.8 + Gallery...permission problems

Hi. I have some problem with this integration and I don't figure out.
First, the gallery creation for newest registration member doesn't work.
Second, when a new register member go to gallery into joomla it display this message "Failed on group: Registered Users permission Type: comment". I think there are some problem with the permissions...
Third, there is a possibility to remove the admin album? Is the only that is show...

Thanks