For wiring I would suggest;
Using pins:
5V -> VCC
GND -> GND
TX -> TX)
RD-> RD)
On Uno add jumper from Uno ground to Uno reset pin.
Then select promini as board type.
Press and hold down reset switch on promini
Press upload on IDE and when IDE says uploading (after compiling) only then release the promini reset switch.
Lefty