Wireless Router Problem

I have a linksys wrv200 wireless router and when i try to set up a second ip to ip game, i get a message, couldn't create game,game may allready be in use.This problem is fixed when i go into router and reboot it.Before i had a wired router and did not have this problem.Also sometimes when i do go to get into router to reboot it from administration,i get a blank white page,this is resolved by going down to where i have the modem and router and unplugging them,then plugging back in.I have the latest firmware and have no other problems with with connection etc,although i did before i did the firmware upgrade,of which i have done about 3 times.This is not a big issue for me,just annoying. Thanks,Tim