My iTunes can't find my iPod but Finder can.

I have an iPod Classic and when I connect it to my MacBook, the Finder find it, I can drag files to the iPod but iTunes doesn't.

Everything started when I was at a Windows, connected my iPod and did the reset. When I got back to Mac, it was already impossible to find it at iTunes.

I already tried to delete files like AppleMobileDevice and stuff, already updated the iTune's new version. When I eject the iPod (at Finder), comes an apple, and then, the screen to change language, like if I had done the reset.

Please, help!!

Dree