Multiple Coupons

I have Opencart version 1.5.6 and am trying to use multiple coupons on one order. Each time I input a second coupon or additional at all, it will cancel out the others and use only the last coupon entered. Is there a setting I am not seeing to change this? I read in the forums that this was allowable in 1.5.5 - but it is not working for me.

Anybody? Need to get an answer.

Hi

I am stuck with the samme question and also on 1.5.6. I have also read somewhat conflicting posts that it maybe was implemented in 1.5.4 or 1.5.3 even.

So is there anybody with a definitive answer on this?