Problem with printer sharing under a network

[hdesbiens]

Hi

i have a little problem sharing my printer under a network, it's a usb printer connected directly on my computer, and someone on my network is printing on this printer, so i have made the printer sharing available for this printer and it works when i do it. But my problem is that every 2 or 3 days later it lost it's sharing property and the person on my network is not able to print anymore.

So i do the same things to share my printer and it works again, could someone tell me how it lost it's sharing property?

My computer is a xp home and the other computer on my network is on xp pro!

thanks