Network Cable Unplugged message for wireless connection on a Latitude D600

I am trying to set up wireless networking on my laptop at my home.  The physical ethernet connection works, but my wireless connection does not work.  I have entered the SSID # in the settings on my laptop.  I have tried toggling the fn-f2 button, but that doesn't work.  When looking in my dial up and network connections, it states "Network cable unplugged" for my wireless network connection.  The device manager for the Dell Truemoble 1300 WLAN Mini-PCI card states that it is working properly.  The Dell Truemobile WLAN card utility does not show any available networks, although my router is listed where I added it under the prefered networks area.  Does anyone have any advice on what to try to get this thing working?

 

Thanks