Install the drivers (even if your OS is Windows XP or try re-installing the OS of your computer)... well that's all that I could think of! You can try it and I really hope this helps... >,<
If still this doesn't work well you can always use the other computer where the mp3 is working! ^_^
Or try re-installing the motherboard's CD (mainboard software) if it's available
NOTE: Yep! Directly connect it to your computer and don't use USB hub...
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