indigo

Hello everybody. I've suddenly developed a problem with sonicstage, when I try and transfer to my MZ-NH700 Hi-MD walkman, sonicstage says: "Cannot use this disc as an audio disc because it is initialized by other than SonicStage. Click device/media button and initialize the disc to use it as an audio disc." Apart from when I do that it still says the same thing. This is a brand new disc straight out of the packaging. Can anyone help me out? Please.