I have PEX, and I cant promote myself. In the users part of the yml file im owner, but i didnt get the prefix permissions etc
1st give your self - permissions.* and than try /pex user ianjamesbond group set GROUPYOUWANTTOSET or if you wanna use /pex promote user than u need to manually give every group a rank like for example if your owner group got rank 2 than you need to type in game /pex group Owner rank 2 or else even if it is displayed in your options in permissions yml you still will need do this for each rank
paste your permissions here and post here link to it http://pastebin.com/ but 1st delete all rank ladder options
after i seen your ranks i just realize who you are so 1st of all you did something wrong in your users list with permissions and stuff but dont bother it its fixed now now paste this into your permissions.yml http://pastebin.com/raw.php?i=ekBa0XdN and than in game type in that order /pex reload /pex group Member rank 400 /pex group VIP rank 300 /pex group Moderator rank 200 /pex group Owner rank 100 /pex group Admin rank 1 /pex reload input all thus 7 commands in exact order as here i posted them and than everything will work just fine you will be able to /pex promote NICK and /pex demote NICK any 1 you wish