Help! Coupon code invalid??

Not sure where to post or who to ask?!? I am using 123inkjets - shopping page pops up with use code swim123 to save.... website automically put in surf123 to save the same thing. When I try to change it to the one here it states it is invalid. I want to be sure I get credit AND use the coupon. What do I do??
Thanks
Ellen

I double checked and they list both of them as being valid for affiliates. So you should get credit either way. :)