I have tried and tried to empty my PM box so Ican send another PM to a member here. For some reason it shows that I have 5 messages but then after attempting to delete the messages I get a note stating that I have no messages present. BUT I can't send a PM because the system still shows my PM box is FULL!
Can someone help?

 

right click and refresh the page when you are at your pm page. There's inbox, and sent box, you may have to empty both boxes?

 

Had the same proplem about a month ago. Tryed everything. I ended up sending myself a message. It showed up in my inbox. Then I deleted it and all messages where gone. Dont know why, but it worked.Good luck