Laptop wireless connection gone

Hi I'm Maurice. My laptop wireless connection disappeared and I replaced the network card but I still had to connect with my linksys usb to get internet. Before it connected wirelessly. Is something else wrong?
 
Is the network adapter enabled in the bios and in the device manager? i recently worked on a computer that kept disabling the network adapter in the device manager. If on Vista just type in device in the search box. Locate your network adapter and make sure it is enabled.
 
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