I reinstalled Windows XP Pro on my Dell Latitude C510 Laptop and now my wireless direct access button does not work. I also cannot see any wireless connection on this laptop. It was working before I reinstalled. I have a Texas Instrument PCI-1420 CardBus Controller listed in my device manager.

Hopefully this helps

Try the following: click start, RIGHT click on My PC, click on administration, select services and applications, select Start wireless configuration service, click start service. Close the window
Open configuration of wirless network, flag the option let windows configure my wirelss network
That should let you see and select your wireless device

I have to do this everytime I start my laptop. I would like to have the system make this automatically, but I don't know how.

U can download the appropriate driver for your network card and install it...the previous driver was removed when u reinstalled the OS and that's causing the hardware not to function correctly