Antabus, it happened the same to me; I thought it might be because I was using the Serial interface when transmitting the midi files via the Windows Media Player, so I thought about trying it at a later time (and I haven't done it yet!).

I have no idea of which version my JV 1010 had, nor of which one it has now.

So I am in the same case as you. Please help us !! :-)