The situation is, I have a Dlink DI-524 router and a DWL-G510 Wireless card. Inside the log for the router I see "DHCP IP Lease" every couple of minutes to every 30 minutes. Seems kinda random...For the same machine, the one with the wireless card. All my other machines that are pluged directly to the router do not have this frequent dhcp lease problem.

The connection however seem to not be a problem, it is constant.