I can use the internet on my linksys 4 port wired/wireless, using this cat 5 connection but for some reason I was surfing and lost connection upstairs on my wireless. I reset the router and cable modem, still nothing wrong with them. I checked the router settings they were all fine. I decided to manually set my IP address and it found the router, however, I can't even ping the router! Let alone use the internet. I get error code 65 while trying to ping. I don't know why it is doing this, anyone have an idea?