File Share Trouble

I am having trouble sharing media files from my PC to Apple TV Gen 2 (black).  I have enabled the folders in question to be shared.  However when I go to Media/Settings/Add Share on Apple TV it is not locating anything.  Should I expect it to locate the PC itself or should I expect it to locate the file?  Any tips? FYI, I am attempting to share files stored on a Hitachi 2TB external connected to an HP Touchsmart PC.

I had the same problem, but since i done a system restore on my apple tv through itunes, now working fine, sharing that is…