Problem pinging computer (XP family / pro)

oh right.. XP home.. :P sry got the french version so.. :P

well, the router gives out adresses 192.168.0.100 to 192.168.0.199 , all comps have those ip's

OMG OMG OMG IT WORKS... lol...don't ask me why... My dad was able to print on the printer connected on the other computer... I don't know, maybe that made windows get it... stupid OS... anywayz... thanks for the help :P