Window 7 pc not showing up on HD22-100

I am trying to stream content from my Windows 7 PC to the HD-DVR22-100, but this computer is not showing up.  I am seeing my HP Home Server and my wife's Windows 7 PC.  I have check in Windows Media Player and the MediaShare is showing on this PC and allow is checked on all lines.  This PC is running Windows 7 Home Premium 64-bit OS.