It could be one of many things.
I would start making sure it doesn't have a function to only charge when connected under the settings on the actuall mp3 player.
If that doesn't work, I would try to find another USB to USB mini cable, or whatever kind of cable yours uses. I believe that is what they use. I say try this because the cable could be bad. What happens when cables go bad is the wires in the rubber part of the cable sometimes become disconnect when moving it around. This could cause the problem you outlined of charging but no detecting.
It could also be on your computer you dont have something enabled such as your USB ports or your plug and play options.... Start by checking under the Windows Device Manager and see if your MP3 Player is there. If not click Find New Devices. If nothing still check the other two options I listed above in this same paragraph.
You could also try process of elimination to solve your problem. Find a USB thing, anything, mouse, mp3 player, joystick, flash drive, whatever, and see if it detects them. If it detects them then it isn't your computer's fault. It would be the cable connecting the two devices(USB Cable) or it could be the device itself such as in the settings menu above or it could finally be dead altogether.
Good Luck
I would start making sure it doesn't have a function to only charge when connected under the settings on the actuall mp3 player.
If that doesn't work, I would try to find another USB to USB mini cable, or whatever kind of cable yours uses. I believe that is what they use. I say try this because the cable could be bad. What happens when cables go bad is the wires in the rubber part of the cable sometimes become disconnect when moving it around. This could cause the problem you outlined of charging but no detecting.
It could also be on your computer you dont have something enabled such as your USB ports or your plug and play options.... Start by checking under the Windows Device Manager and see if your MP3 Player is there. If not click Find New Devices. If nothing still check the other two options I listed above in this same paragraph.
You could also try process of elimination to solve your problem. Find a USB thing, anything, mouse, mp3 player, joystick, flash drive, whatever, and see if it detects them. If it detects them then it isn't your computer's fault. It would be the cable connecting the two devices(USB Cable) or it could be the device itself such as in the settings menu above or it could finally be dead altogether.
Good Luck