Help with Embedding Promo codes with links

Hi All-

Question:

I want to create a direct link to one performance with a promo code.  I am getting the link to work to take me to the correct SYOS map in TNEW, but I can't get it to "enter" the promo code word.

I have tried all combinations with performance number, promo source # and promo word. 

What am I doing wrong?

Thanks,

Jessica