DI-824VUP+ could not connect to DWL-G120

Hi.

Last night I experienced something strange. My DWL-G120 USB (PC1) card
could not connect to my router (DI-824VUP+).
I logged in to the router via another computer (PC2) which is connected
directly to the router, scanned the logs, found nothing.
PC2 had internet connectivity and all.
I then restarted the router (under the Admin menu), and the DWL-G120
connected immediately.
Somehow it seemes that the WLAN was down.

I recently installed firmware 1.03 (used 1.02 earlier). I've only had
the router for a month or so. It's always on, and I'd hate to se that I
have to restart at odd times. When it's set up it should just work.

Any ideas?

--
Stein Arne