stm32f105 Device Only issues

[AMaka.1]

HI

I am struggling to set up USB Device only on stm32f105

I do set up following

1. RCC - Crystal resonator
2. SYS - Debug Serial wire
3. USB_OTG - Device only
4. USB Device - CDC
5. Clock I set up 8MHz and run resolve
6. Build project and load firmware

And after connecting to PC nothing happens at all.

I have the same issue with f730 for some reason, but it works on f103 (different setup) and f407. I really don't get it what I am doing wrong.