problem router-računalnik (napaka DHCP)

ko me skensla z interneta in pogledam v computer manager (event viewer) dobim sporočilo o DHCP napaki :
Your computer has automatically configured the IP address for the Network Card with network address xxxxxxxxx. The IP address being used is xxxxxxxxxx.
al pa takšnega:
The IP address lease xxxxxxxx for the Network Card with network address xxxxxxxx has been denied by the DHCP server xxxxxxxx (The DHCP Server sent a DHCPNACK message).
res ne vem kako rešiti ta problem.

imam WinXP x64, router belkin pre-n wireless...