Applying promo code to customer doesn't work

[shout]

I am trying to apply an $8.50 discount to a customer using a promo code.

 

 

On the client's profile, under Products/Services, I selected the promo code under the menu labeled "Promotion Code (Change will not affect price)".

 

It truly did not affect the price! Price stayed $10. Why does it do that?

 

Anyway I checked "Auto Recalculate on Save" box under Recurring Amount. However, the recurring amount changes from $10 to $0, instead of to $1.50 as expected.

 

What am I doing wrong? How do I apply a promo code to a customer?

[shout]

Update: I manually set the recurring amount, but on the "next due date" an invoice wasn't generated. Any ideas?