More wireless problems

This morning, couldn't get a wireless connection at all either in any Linux OS or in Mac Leopard. Tried the usual re-booting but no luck.
Then Killian informed me that he had no wireless on his Vista laptop either.
So, I decided to try could I repeat whatever that Eircom guy did a few nights ago.
So, I opened up the router homepage and went to wireless. What was interesting here was the Privacy, which had been set at WEP-Automatic had gone back to WEP-Manual. What's causing this?
So, I put it back to WEP-Auto, saved the change and rebooted the router. Then after it had settled down, wireless was back.
But I'll have to talk to Eircom tomorrow to try to see what's happening here.