[Plugin: WP Supersized] Link doesn't work

Hi,
well, i have a little problem. i use this plugin and it works excellent, execpt the wallpaper-link doesn’t work.

Maybe it’s a problem with z-index? i don’t know. I tried several things, but nothing worked.

So, i hope, there is any solution.

Plugin is in use on http://www.gameothek.com/

thanks in advance

http://ww.wp.xz.cn/extend/plugins/wp-supersized/