SonicStage and PSP

Ok so I have a Sony network walkman. I can see that the PSP supports ATRAC3plus format, but when I connect the PSP to the PC via USB and open the SonicStage program my PSP isn't recognised, according to the manual it should be. Can anybody offer me any help on the matter? I'd appreciate it.

Yep that s a known problem, the version update with PSP support has not been released yet (somehow the atrac3p support on psp is a bit particular). It doesn t work when connecting directly the memory stick to a VAIO neither btw