Unable to open Capability Manager options

I was unable to open manager settings page, see screen shot

[URL=http://img268.imageshack.us/my.php?image=screenshotun.png][IMG]http://img268.imageshack.us/img268/2236/screenshotun.th.png[/IMG][/URL]

Any help please?

http://wordpress.org/extend/plugins/capsman/