Sony MP3 Walkman Vs Mac 5.1 ???

Hi

I recently purchased Sony's NWZ-B142 MP3 Walkman, and when trying to synch files from my Mac 5.1. Leopard 10.5 nothing happens, it won't even allow me to recharge the battery. So I'm assuming two things.. the WM is either not compatible with my Mac? or i need to install the correct drivers.

Could anyone make any suggestions?

thanks.

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