Cannot Copy from PC to Internal HDD

[reg828]

I have HD2 and followed instructons to download bootcode and then firmware, everything else seems fine but when I try to click Menu in File Mgr for Network file, I get that round red signal that I cannot do it
I can only copy form HDD to ? well HDD

any fix, or what am I doing wrong, I did give full control on Windows 7 as well?