Default Smart Dock not working since kitkat upgrade

Hello XDA, this is my first post.

I had the same problems: 4.4.2 official version in my GT-N7100 and my Smart Dock is not working properly: the USB are not working at all.

I downgraded my Note 2 to 4.3 but it's still not working.

Before upgrading it was everything ok.

I sent an email to samsung but I received no answer at all.

Any sugestion?

Thank you