tin_dog

So, last night I was playing tekkit, got a server running on ubuntu, my friends all got on it fine, I come to start it back up this morning and it won't bind to port, i've changed absolutely nothing in the properties at all so why won't it bind? I checked my router virtual servers, all the stuff I put in there is the same so I have no clue what the problem is, anyone got any ideas? Thanks tin_dog