I cant renew my ip!:`(

I have this issue where i cant connect to my router from my second computer, and renewing the ip is not an option it seem..It just says An error occurred while renewing interface local area connection : unable to contact your dhcp server. Request has timed out.

I don't have mcafee so http://forums.techguy.org/networking...cp-server.html does not help me a single thing ..

Best regards andreas