PEX AND BUKKIT ERRORS!!

Ok so I have to problems:
1: I cannot access bukkit through my regular computer. I am using my phone right now to post. Anyone know why?

2: I get this error whenever a person tries to join from Pex. It repeats these four lines some 17374737374 times. So yea here's the code:
07.06 22:55:56 [Server] SEVERE at ru.tehkode.permissions.PermissionGroup.isChildOf(PermissionGroup.java:358)
07.06 22:55:56 [Server] SEVERE at ru.tehkode.permissions.PermissionGroup.getParentGroups(PermissionGroup.java:239)
07.06 22:55:56 [Server] SEVERE at ru.tehkode.permissions.PermissionGroup.isChildOf(PermissionGroup.java:358)
07.06 22:55:56 [Server] SEVERE at ru.tehkode.permissions.PermissionGroup.getParentGroups(PermissionGroup.java:23

Thank you to whomever can help me!!!!

 

Your permissions.yml please? (Pastebin or Pastie it pl0x)

 

I fixed the perms problem but I still have the other one.