Routerboard Serial Port Problem

I can’t connect to two Routerboards with a serial port. The serial port was set to 115Kbps w/hardware flow control but nothing. Turned off flow control on the PC and Routerboard but still don’t see anything.

Checked the settings on the Routerboards for the serial port as well.

Any idea why I can’t see the Routerboard via the serial port?