Hi there. I'm in the same situation here. I've installed Sonicstage 4.3 on a Windows Vista Ultimate 64bit laptop and when I plug my AM-NX9 in, the device is not recognised. I downloaded the pa driver file and installed it... the folders appear in the "program files\sony\personal audio driver" folder but seem to not have been installed. I've gone to device manager in the control panel and tried to manually install the drivers but after pointing vista to look in the above folder, vista pops a window up saying no suitable driver found. Anyone else have any answers? Thanks for your time W