You need to swap the RX and TX lines over if you are trying to use the built in FTDI chip. (RX means the 328p's RX pin, which means that is the FTDI's TX pin).
You need to swap the RX and TX lines over if you are trying to use the built in FTDI chip. (RX means the 328p's RX pin, which means that is the FTDI's TX pin).