Sony Walkman not connecting to computer

I had a similar problem (my computer uses Windows XP) - Sony Walkman beeps a couple times when I insert the USB Cable that connects it, like it is connecting, but it does not charge or is not found by Windows Media Player. In my case, the way I fixed it was to:
1, Go into Control Panel
2. Double Click 'System' ICON
3. Select Hardware Tab
4. Select Device Manager
5. Select 'View' at the Top
6. 'Devices by Type' AND 'Show Hidden Devices' should be selected
7. 'Scroll down to 'Portable Devices' and open it up.
8. My Sony Walkman was there with and Exclamtion point ( ! ) in a yellow circle,
9. Right Click on this yellow exclamation point.
10, Select 'UNINSTALL'
11. Once the computer says 'Device has been Uninstalled, Disconnect your Walkman's USB cable then reconnect.
12. At this point, my Walkman was recognized by my computer, started charging, and was recognized by Windows Media Player

Hope this helps

Simple anwer:
Go to My computer right click select Hardware tab
then Device Manager select usb controllers right click icon walkman...
select driver tab,select update driver choose advance,choose dont search...
then dont select the mtp device only click the usb mass storage ^^ then its ok

U may my b using a cable that is not fully compatible with your system