wireless adapter keeps crashing vista

I've a D-Link Di-624 rev C with latest firmware. A DWL-G132 with latest
drivers.
I can get them to connect, but not for long. Eventually (within minutes),
the connection drops. If I try to reconnect it can't. If I go check in
Device Manager, sometimes the Wireless Adapter isn't even in the list
anymore! I have to unplug it, and then replug it in. Sometimes it will just
plain crash and then I must reboot.
I've tried unencrypted, WEP, WPA, WPA2, dynamic, static, DMZ, Super G, Super
G with Turbo...

This is so difficult to get to work, that I went out and bought a Vista
compatible Wireless Adapter by Linksys. I'll post another question about why
that one doesn't work either.