I posted this issue in the "Help & Support" group but I'll re-post here too:
As I see, there are compatibility problems with some plugins which are:
1- JW Player for WordPress – Flash & HTML5 Video Player: It doesn’t work with the CBox theme while it works when trying another theme.
2- jQuery Colorbox: It works but problems in appearance. The photos appears cut.
3- BuddyPress Album: doesn’t work at all. The plugin is a little old but it works with other themes.
What could the problem be?