AirPort Extreme (MC340AM/A) won't recognize USB hard drive

Hi,
It was working fine (at least that's what I believe) to one point, and then all of a sudden, AirPort utility won't recognize my external HD connected to USB port of my AirPort.
Just to eliminate possible confusion... drive is formatted as Mac OS Extended (Journaled) and I had another one as well, sitting on my desk that's formatted as FAT32. Both of these drives were connecting fine to AirPort utility till last night. All of a sudden, absolutely nothing happens when I connect either one of these two and turn it on. AirPort Utility/Disks pane shows: NO DISKS FOUND.
I even replaced this USB cable just to eliminate this possibility, still nothing.
Could it be that my USB port just died? I have 14 days to return it and I'm on my second day, so I want to know before I run out of my return bonus.
Thanks in advance!

OK, I just tried another external HD. This time it was LaCie 1Tb. As soon as I connected it, it was recognized by AirPort Extreme. What's puzzling is, that same thing happened with my SimpleTech 1Tb one last night. It was easily recognized by AE and then all of a sudden AE would never recognize it again.
At first, I though maybe these HDs are not supported by AE, but that's not the case. One is LaCie with Samsung HD103UJ drive inside purchased at Apple store, another one SimpleTech with WD inside, and other two are both super reliable Sygate HDs (never ever had any problems with them).
Hmm... I just disconnected LaCie one and tried SimpleTech one more time and it worked. AE can see it again. What's going on in here? Something is definitely not right.
Can't test this port through printer since I don't have one available at the moment.

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