I'm trying to plug a cable from my modem to my pc. I have 2 pcs. On one PC it works fine, i get online when i plug it. I switch the cable to the other pc and nothing happens. i dont get a connection. am i sticking it in the wrong hole? it was wireless before so i have never put a wired connection to it. here are the pics of the hole im trying to put it in. its the only one i see. Is that the right one? thanks.