Ipod shuffle unable to proceed in recovery proces

My Ipod shuffle (4g) isn't visible in Itunes and in explorer. Recovery doesn't proceed after pop-up notification "Preparing for Recovery". What can I do to make it work again?

Problems started when I accidently disconnected my Ipod during synchronising. Before it worked perfectly.

I've tried removing and installing all apple software (latest Itunes version), but no succes.

In windows device manager Apple mobile device usb driver is visible and working correctly but when I connect Ipod and press Volume- for a few seconds it disappears. Then Preparing for recovery pops up in Itunes, but recovery doesn't proceed.