SMF Gallery Lite permission to manage gallery

[softtouch]

I have installed SMF Gallery lite in smf 1.1.1.
All works so far. As an admin, I can create and manage the gallery.
Now, I check "Manage Gallery" under the permissions for group Global Moderators.
If a mod click the Create Category link, he will be asked for a password.....??
What password? Why?

[SMFHacks]

What does it say when they enter their password for their account?

[softtouch]

It popup a password box from the forum, see attached image.
It continue popup even they enter their login password.
The people I let try it are global moderator, with all rights regarding gallery checked in the admin panel, also "Manage Gallery".

[softtouch]

The password it is asking for is the administrator password. Why does it ask a global moderator with the permission to manage the gallery for the admin password?

[SMFHacks]

It shouldn't strange.

[softtouch]

It shouldn't strange.

Yes, really strange. I don't know where to look for that in the code, so what can I do?