Stm32f4 DISCOVERY/ Trying to change slave mode and trigger source with REGISTERS for 3 phase shifted PWM.

[YSevi.11]

I read datasheet stm32f407vgt6 datasheet TIMx slave mode control register (TIMx_SMCR) configured as datasheet said but doesnt works. I shared my mainC I am beginner in embedded software and register programming. also ı Shared my timer configs cubeIDEthis is I genereted with cubeIDE settings this is one of the configurations i want to change with slave mode and trigger source regsiters.

these are the my cube IDE settings