Like I said, your copy of 2.0 RC1.2 is not current/correct... I can see from that screen shot that you're atleast missing language strings... I'm not saying you just have run upgrade.php, you need to upload all fresh files using a decent FTP client that will overwrite existing files as well. The mod does work on a fresh copy of 2.0RC1.2, so until we know that you have a properly working copy (which I know you don't), I can't really even troubleshoot it with you.