Ok...thanks for all ur help up to now...i don't know wot router i have, i will find out when the person who bought it (Dad) gets home. I have uninstalled limewire for the moment and will start trying again in a few days.

By the way, im not the only person this has happened to, a few of my friends have the same problem, had it working fione and then suddenly lost connection!

I'll reply soon will the results to your suggestions, thanks again!