Wireless Turns off and On Repeatedly

The wireless connection turns off and on repeatedly. XP PRO, Dell Latitude D600, Centrino mobile processor, 1.2 GB RAM, Intel PRO/Wireless 2200BG XP PRO. service PAK 2 All updates are current.

The Device manager shows no problems anywhere with any device.

I clicked on Network adapters and then clicked on Intel PRO/Wireless 2200BG Network Connection which reports "This device is working properly" On the Driver tab I see:

Device Provider: Intel
Driver Date: 12/19/2007
Driver Version: 9.0.4.39
Digital Signer: Microsoft...........

The Resources tab indicates:

Memory Range: FAFEF000 - FAFEFFFF
IRQ: 5

Could the memory range be a problem?

I was given the D600 after the HDD went south. Wireless worked before that. I replaced the HDD and reinstalled XP PRO.

All updates are current. Running Service Pack 2. Service Pack 3 not available for Latitude D600 running XP PRO 32 bit.

I noticed the used computer stores in town do not have the wireless running on any laptops that run Centrino, and do not gurantee the Intel wireless.

I have run the troubleshooter many times to no avail. It wants me to not run open with many warnings to not do so. I run my LAN open as I am deep in the woods. Could running with an open configuration be the problem? Are people having the same problem on LANs that are not open?