WDTV Live won'y read both of my external hard drives anymore

I attached my 2 external hard drives both are a 2tb hitachi and when the WDTV player loads it will only load 1 drive and not the other but gives me a message that media player is scanning attached usb device. Anybody have any ideas how to correct this problem

There are other people that report similar things; most often, it’s a Wireless dongle plus an HD.

I saw this a while back when trying to use a USB stick and a WLAN at the same time; wouldn’t work.  

I didn’t spend much time troubleshooting it, as all I was doing was a Firmware update, so I didn’t need the WLAN…