Pex and Essentials not working....

[That Guy]

I've got Permissions EX on my server, however the problem is that people can't use the commands...

http://pastebin.com/hRU0ZUEF

^ Is my permissions nodes from permissions ex... I've also go NoItem, which refuses to work with PEX. Chances are I'm making some silly mistake with my permissions nodes.

With Noitem, I've added the .jar file to the "Addons" folder, however it still generates an error:

[WARNING] [PermissionsEx] Unknown server implementation being used!

[WARNING] [PermissionsEx] No Permissible injector found for your server implementation!

Any ideas anyone?