I have GoGear Vibe 8GB SA2VBE08K/02

My device has the latest version of its firmware (2.31), and I have downloaded to my PC the latest version of philips songbird (2.5.1).

When I'm trying to sync and transfer the songs files from my PC to my device, by using philips songbird, I'm getting al the time the following note: "Completed syncing device with error"

What should I do to fix it? Pls help me, since it's very frustrating!