Windows 7 doesn't recognize iPod Nano 2nd gen suddenly

[Peppe Weapon]

I don't remember if this error occurred upgrading or something, because at time I was using linux much more than windows and that problem didn't appear.... well, Windows doesn't recognize my iPod Nano 2gen in "Rockbox mode".

I have to restart and run iPod classic boot to get access to files... Linux recognizes it, and Windows isn't, but I remember that, some times ago, this problem was never existed!!

Here you are some information about Rockbox version:

Bootloader: 2009-10-13 T08:17:25
Rockbox base: 3.10

I've installed the lastest stable build, but problem persists.