AEBS cannot see both disks in 2 disk enclosure set to JBOD

I have a MacPro 3.1 and AEBS, the computer runs 10.6.8 and Win 7. All most recent updates installed on both OSes and the AEBS. I have a generic (bought at Fry's) HORNETTER, 2 disk external USB enclosure containing two (2) 500GB hard drives, both formatted to FAT32 for easy sharing purposes with win, which is connected to the AEBS via its USB port.The enclosure is set to JBOD (Just a Bunch of Disks), so I can see each one individually. The enclosure is externally powered. I have had problems in the past with this set-up off and on. Now it is VERY tempermental, sometimes it works, most times not and now over the last couple months it has stopped working for all intents and purposes.
The problem I get is that the AEBS does not see both drives, only one. This happens in OS x and Win 7.
I get an error saying there is a problem with the disk, connect it to the computer directly and run Disk Utility to check for errors. So I do this every time and it returns no errors. Both disks can be mounted no problem if connected directly to the computer. But if I unplug it from the computer and plug it back into into the AEBS it stops working again.
I have this same problem with my HTPC Mac Mini 2.1 (C2D 2/0Ghz). I tried connection it with the same config and got the same problem, only one disk shows of the two in the enclosure.
Is there anything I could do to resolve this? I have searched high and low for a direct answer, but only see confusing responses and nothing direct on point. I apologize if this is a common issue.
I am not trying to do any Tim Machine backups, just using it one drive to store my media (music, video) and the other drive as a extra storage/share volume/hand backup of important files. I like having it available off the AEBS so I can access the music and video from my HTPC Mac Mini and my DVR Windows machine, as well as using them both as a easy swap for mac files I drop there for when I'm booted into Windows.
Any help would be appreciated.

UPDATE: I read some tips on other related issues, and so I tried connecting a POWERED USB HUB (a Targus brand 4 port AC powered USB hub I had lying around) to the AEBS and then the external enclosure to the hub.
No success, and two different problems.
In OS X I can now SEE both disks (where before only saw one disk), but the problem now is even though I can see both disks I can only access one (the one I could NOT access before). The disk I could access before is not visible but when I try to double click on it to mount it, i get a spinning blue circle and eventually the request times out with an error which makes no sense, but says:
"There was an error connecting to the server “Lou's AirPort Extreme”. Check the server name or IP address, and then try again.
If you are unable to resolve the problem contact your system administrator."
When dismissed this is followed byt eh additional error message:
"The operation can’t be completed because the original item for “BACKUP” can’t be found."
On Win 7, I now cannot see the AEBS at all, and neither disk is visible.
*sigh*
Back to square one......
SECOND UPDATE: Connected a USB thumb drive to the Powered HUB and it shows up fine. So now I am just totally confused.

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