The info about the high speed USB did the trick, but I had to put an external 1k5(as mentioned in the datasheet) pullup on D+ to make it work properly and for the MCU to be identified as an high speed device.
As for the osccon settings, there are still one choice, bit 8-11 that has a choice that I belive doesn´t belong there.
My speed setting for the project is set as in the example above.
Thank you very much for your help Steve
Best regards
Nick