Why won't my xbox 360 read my mp3 thats connected via usb?

It looks like that the chipset isn´t supportet by the Xbox.

Do you have a normal USB Stick for testing?

Sorry my english isn´t the best^^

Is the Filesystem of the USB-Stick FAT32 ? Because NTFS doesn't work with the XBOX360.

Do you even see the mp3 Player as an external portable device?
i doubt it. When you dont see your player as an external disk its not well formated or not supported

If you plug your player into your PC, is it listed like a regular external disk with a drive letter (E: for example)

Maybe you have to tell your player to work as a disk, like android phones where you tell the device to act as a USB-Drive.

So long