can you see the BOB menu on the left? If so, is Auto BOB on? If it isn't, either turn it on or go into a game & click "Start BOB". If you don't have the menu, try uninstall/reinstall. Here is the install link:http://userscripts.org/scripts/show/52341
If that doesn't help, post your browser & version, what addons you have, and any errors from your error console, go to "Tools" -> "Error Console" -> "Errors" and we'll go from there.