@mwro - What other plugins are you using? I just did a clean download of the plugin from the repository and installed it on a clean version of WP without reproducing the error.
However, looking at line 4 of that file, I see what might be causing your issue. I use a lot of PHP5 syntax in my plugins, and line 4 is a "public static" variable declaration. If you're not running PHP5, your system might have problems with that.
So here's what I recommend:
- Check what version of PHP you have installed using
- If you're already running PHP5, come back here and let me know so we can try something else.
- If you're not running PHP5, work with your host to switch over.
Remember, WordPress will be dropping support for PHP < 5 with the next release due later this month. So an update to PHP5 is something you'll need to do anyway just to keep up to date with WordPress.