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ARM: STM32F756 SWD Communication Failurr after program

Hi all,
I started working with new procesor. I have my own pcb board with STM32F7. After upload program by SWD I have error: 'SWD Communication Failure' and I cannot debug my project, even connect normally to stm. I have to change option: Connect & Reset Options -> Connect under Reset. Why?
If erase processor connected under reset it's backing again to be visible in Keil Debugging Settings. It's look like I'm programming bad sectors or something like that.

I'm using:
Keil uVision v5.18
Keil ULink Pro programmator
STM32F756ZG processor
Ram for Algorithm: 0x2001000, size: 0x1000
Flash address: 0x08000000 size: 0x00100000