:sad: okey well i was a op in this room i created but people come in as my friend using one of my frineds username and take over my room when i make them a op thinking that was my friend etc .. how can i take over my room with out having to ask them to op me???

Um I don't think you can :( unless you are still oped you can use /deop to remove them from the op list, other than that I guess you'll just have to make a new room?

Also, you can check the IP of your friend by doing /IP whatever-the-user-name-is, to make sure it matches your friend's one (if they tend to have a fixed IP, of course). If not, it's always better to talk to them before you invite them in. Ask them a few things to make sure it's not someone else :)

AND don't "op" them too quickly...

Another but a little more awkward way if you op someone by accident and they remove your op is to create a new room and invite only your friends.

If you make your new room private (by setting the Player Limit to 1) then you can decide who enters and who doesn't. Checking your friend's IP as MrsNerdinator mentioned is one of the best ways of authenticating your friends. You could always add your friends to your buddy list or just tell each other that you are logging on by using MSN or another IM program, just to make sure :)