going back and forth between wired/wireless in Vista

Hi! I am new to the forums and to Vista. I just purchased a Gateway laptop that came with Vista Home Premium 64 bit.

On my old laptop (and indeed, on every laptop I've owned), if I wanted to switch from wireless to wired I just turned off the wireless card and plugged in the wire. The laptop recognized the switch, no problem. However, on my new laptop, it claims that there is a problem when I plug in the wire and turn off the wireless. It claims that there are two networks connected and I have to disconnect one. Eventually I got it to work by disconnecting all networks and then only reconnecting the wired connection. But I'm trying to figure out if I'm going to have to do this every single time I switch connections? Because I never had to before...