theme error

I have just upgrade my gallery to 2.0.2 but I have always the same error when I try to change the theme.
What can I do?
Please help me :S
thank you
op
www.nelshael.com/wp

Error (ERROR_BAD_PLUGIN) : Class wpg2connectionsTheme does not exist

* in modules/core/classes/helpers/GalleryPluginHelper_simple.class at line 113 (gallerystatus::error)
* in modules/core/classes/GalleryCoreApi.class at line 187 (gallerypluginhelper_simple::loadplugin)
* in modules/core/AdminThemes.inc at line 320 (gallerycoreapi::loadplugin)
* in modules/core/SiteAdmin.inc at line 153 (adminthemesview::loadtemplate)
* in modules/core/classes/GalleryTheme.class at line 688 (siteadminview::loadtemplate)
* in modules/core/classes/GalleryView.class at line 285 (pgthemetheme::loadtemplate)
* in main.php at line 287 (siteadminview::doloadtemplate)
* in main.php at line 87
* in modules/core/classes/GalleryEmbed.class at line 153
* in /home/mhd-01/www.nelshael.com/htdocs/wp/wp-gallery2.php at line 55 (galleryembed::handlerequest)

System Information
Gallery version 2.0.2
PHP version 4.4.1 cgi
Webserver Apache
Database mysql 4.1.11-Debian_4sarge2
Toolkits
Operating system Linux w-01.th.seeweb.it 2.6.13.4 #1 SMP Wed Oct 26 08:19:13 UTC 2005 i686
Browser Mozilla/5.0 (Windows; U; Windows NT 5.1; it-IT; rv:1.7.12) Gecko/20050919 Firefox/1.0.7