rum0 driver wireless fails after install

[jasites]

I recently bought an ASUS WL-167g wireless USB adapter specifically because it was listed as supported by OpenBSD 4.3

When I first got it, it worked flawlessly after just plugging it in. Recently, however, OpenBSD won't ping anything on my local network with the adapter. Wired networking works fine, but I need wireless. I have dual-booted and used live CDs (including the OpenBSD install disc shell) and it works perfectly. Any ideas as to why it would simply stop working? I've reinstalled OpenBSD 4.3 and simply won't work after I install it to the hard drive.

My laptop is an HP ze2000 AMD/ATI chipset that has otherwise been satisfactory with OpenBSD.

Any help is greatly appreciated. I would really rather not have to install some GNU/Linux variant on it just for the wireless, but am out of options.