it didn't work before for me too, But now it does. almost at the end of the procedure is the place you can type the code.
It's fixed today. It wasn't your fault. They took a while getting the coupon going I think.
I was able to get it. I went there and added it to my cart, and then viewed cart. There was a place there to add the coupon. You have to remember to APPLY the coupon.
This happens most months. You have to wait a couple days into the new month before the free code is effective. It's possible because it's a holiday and a weekend that the code has not been activated yet.
Sorry, it's on the list SewMom posted Dzgns ;D