Help please,,, when connecting my N9 to Nokia suite, I get this message:

The phone is not in PC suite USB mode
Nokia Suite could not recognize your phone. Try disconnecting and reconnecting the usb cable.
Choose the nokia suite (or nokia ovi suite, or PC suite) USB mode on your phone if asked, make sure that you have not set any other USB mode as default mode in your phone's USB settings..

????

Any hints?