[Plugin: GRAND FlAGallery] How to use 2 or more skins?

Hello,
i want use 2 different skins but when i activate it, only one is active for default. I’ve tried with shorcode, like this:

[flagallery gid=2 skin=default name=Gallery]

But i’ve this message:
Couldn’t load the Main XML file.Error #1090

http://wordpress.org/extend/plugins/flash-album-gallery/