DJM 450 utility USB Not connected WINDOWS

Hello!

First of all, I'm from Argentina so my english is not the best.

Second and more important to me. I have a new DJM 450 and I wanna use it with Traktor. Firmware is up to date 1.03. Drivers for Windows are installed. The mixer is on. The USB cable is plug in and when I run the Pioneer utility there is no conection at all. The selector is on USB. I tried to change the cable, change the USB port, uninstall drivers and re installed and nothing. What am i doing wrong??

Can anyone help me with these problem? Thank you very much!!