cannot connect to my own server

[Tree]

i searched the forums high and low * and i know there is a post answering this becuase i saw it a while back but cannot seem to relocate it * for an answer to my problems

Basically i have no porblem with my server, people can get in, no lag, no problems how ever i being the server_OP i cannot manage to log onto my server when i run them together on the same computer. Other people seem not to have this problem for some reason. I have a router and i opened ports up all fine, im 99% sure its not a source / DB problem. if ANY one has a answer to this troublesome problem PLEASE RESPOND!