External HD suddenly disappear via Airport Extreme

Hello all~

This problem just occurred yesterday and I have tried everything that I've known of....

I'm using MacBook Pro OS X 10.6.8, Airport Extreme 4th Gen, and GoFlex Desk 3TB
The ExHD used to appeared under shared on Finder for about a year already...But it suddenly disappeared yesterday
I tried it on my printer and it works fine...but not with all my 2 of GoFlex HD
I did appear under manual setup of Airport Utility....

I did both soft and hard reset, but nothing seemed to work...If someone can help me out with, that would be great!!!

Thank you~!!

Will it show up in Finder with it plugged directly into the Mac and if so try and do a repair disk permissions.