i bought a 4 port usb hub from my local computer shop, reason being so that i could quickly put my camera and voice recorder in quickly without running round the back of my machine, for this to be convenient, i also bought a usb extension, i thought i was being clever, hub works when directly plugged into computer. but with the extension, computer freezes on the internet, even with nothing in the hub. so unplug the hub from extension, internet works, plug it in internet freezes, so what i want to know , is whats happening and how do i get over it.