Question Players cannot do anything!

I have PermissionsEx set up on a bukkit 1.8 server... as far as I can tell, PEX is working correctly. Players have permissions. The problem is that, for some reason, none of the permissions are actually activated for these players. The admin group can still function and, as far as I can tell, the two kid groups are functioning... but the "member" group of players cannot seem to even break dirt blocks far from spawn...

My plugins are: dynmap, essentials, worldedit, PEX, griefprevention, and treeassist.

My permissions file yaml is here: http://pastebin.com/sQ24KdnM

If you should need any more information, let me know. I could really use the help!

 

Essentials has multiple modules. Is the AntiBuild module installed? If it is, then add the node essentials.build to the permissions.yml.