I need help with a schoolproject

Hello,

Is here someone who has experience with flipsky esc motorcontroller, especially a ft60db dual.

I can't connect to my esc and if I get a connection I can't run my motors on the master side. The slave is working fine but the master side doesn't work. When I switch the esc on the master side is blinking some minutes red and then it stop, but it won't work :/