Ok, so at work I plug my laptop into the Cat 5 jack to get online, and that works for about an hour, hour and a half, until I get disconnected from the internet. However, when I try to connect again, it says that I'm already connected to the network, but I have only local access and can't get online. This doesn't seem to be a problem for other people at work. Is this something wrong with my network card? Or is it something with the network?