Hi guys, good news, I solved the problem and you helped me a lot, because all your answers pointed at no WiiMc problem … so I searched in my Win Xp and MS papers, and finally I found it and share with you:
There was a missing parameter in the registry … system/currentContrlSet/Services/lanmanserver/parameters called IRPStackSize; so I added it and tried with many values, finally left it in 10, where it worked fine (don’t forget to restart your computer).
So now the problem is solved: I can access my external NTFS disk (it must be shared from the root, not a subdirectory)
Thank you all very much, see you!!