yup, xp is your os.... what exactly do you mean, or see that lets you know people arent connecting?
also look in limewire's options, theres a part in the left column called Bug Report- click on that
Then click the button alled View Example.
In the window that comes up scroll down (about halfway or so) to a part that says "Received incoming this session=" and let us know if it says TRUE or FALSE after the =.