Cannot enable Wireless adapter

I have a fairly new (2 months) Inspiron 600m. I can't enable the wireless adapter (it always has the red 'X' on the icon). I tried a couple suggestions I found in this forum (tried using the Fn-F2 key combo, and I also tried enabling it via the Properites option from Network COnnections, but there is no WIRELESS tab to click on. I then attempted to get the wireless tab to display by going into Computer Management/Services/Wireless Zero Config/Startup type and setting that to Automatic (the value was already on automatic).

The wireless card is a Dell Wireless 1370 WLAN Mini-PCI Card. What can I do to enable this card?

Thanks for the help in advance!

Phil