Create two TCP servers on stm32

Hello,

I'm trying to create two TCP servers on the STM32F767ZI microcontroller. I created my first server which is a WEB server (port 80). And now I would like to add a second TCP server (port 502). I created a second thread thinking that it was working and unfortunately, no. 

If you can enlighten me on this subject which is for me new.

Init servers

Webserver

Other server

Thank you in advance,

Steven.