The Mac HFS+ Disk Support option enables Windows to recognize Pro Tools sessions created on Mac-based Pro Tools 7.x–9.x (.ptf) and Pro Tools 5.x–6.x (.pts) systems.
Mac-based Pro Tools 5.x–6.x sessions that reference audio files in Sound Designer II (SD II) format are not supported on Windows.
If your Mac-based Pro Tools session includes any audio files in SD II format, you will need to return to the Mac-based Pro Tools system and re-save the session so that its audio files are Windows-compatible, then open it on your Windows system.