The answer is: "Patience." There was nothing wrong with the setup.
I waited several minutes for results and when nothing happened I disabled the port. Disabling the port aborts the process. It took more than the minutes I waited after the SPROC completed for a message to be returned.
Thank you for your help gentlemen!
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…