A21m wireless connect drops signal every 15 minutes

[Ianski]

My daughter has an old Thinkpad A21m which gets light use for e-mail and web-browsing. She has a D-Link DWL-G650 wireless PCMCIA card installed - revision B5, with the appropriate version 2.54 (canadian) D-link drivers installed. The operating system is Windows XP SP2. The issue she's having is that her connection to the Internet gets dropped momentarily every 15 minutes or so. It reconnects immediately afterwards, but still - very annoying. The issue shows up as a "warning" in the system event log (1003) and an "information" (4201).

We've tried connecting at my home (where I have the matching D-Link router) and at her home where she has an old D-link "B" access point, and the same thing occurs in both places. So it isn't a router issue. Other laptops connect here just fine, and I took my new IBM to her house and it connected just fine, too.

I swapped out the card with an identical, brand new D-link card fresh out of the box. Same issue.

I tried changing a setting in the card properties from "long only" to "short and long" - didn't help.

The system is a standard issue A21m with a Pentium III/750 MHz CPU, 256 MB of RAM and a 20 GB hard drive.

I am hoping there's a wireless expert on these forums that might be able to give me more suggestions...

Regards,
Ian