WD Live can't access videos on USB attached to Airport Extreme

I have a WD MyBook Essential (3TB) attached to my Apple Airport Extreme. The USB Drive has 3 partitions, 2 for Mac backups, and one for video storage. I can see the Airport Express as a Network Share on the WD Live, but when I try to access it, it sez (There is no media in the current Folder). I can fully access the USB Drive from my  PC, as well as my MacBook, and even the Plex Media Server on my iPad.

Any suggestions?

You can try doing a hard reset on the Media player to see if it rediscovers the whole network again.