# Simple FPGA serial communication not working

synthesis reports

I created a simple schematic which shorts the TXD and RXD pins according to the manual. However, when I use RealTerm to send some data it seems that the result is not displayed at all (nothing is received on the PC). TXD is PIN_G9 and RXD is PIN_G12 but I have tried switching them to no avail.

I have made sure the protocol settings are the same through the Device Manager and RealTerm. What else can I be missing? I'm starting to think there is something wrong with the cable...