For instance many machine front usb ports are not wired up so try the rear ports. Then some ports are disabled or no motherboard drivers installed.
Your post didn't tell much so I'll have to stop here.
Can someone please help. We recently purchased a Insignia? 4GB* Video MP3 Player. We have windows ME and we have installed the software and the computer is not recognizing the device. We are unable to transfer files to the MP3 player. Any suggestions?