If anyone can advise on ironing a kilt jacket, I'd greatly appreciate it.

I recently received my black Argyll from Rocky. Great jacket by the way! Love it!!!! However, on the right side, just near the button, there's what looks like a wrinkle. So, no problem, right? Just iron it out. Wrong!! I put a cloth over it and tried to steam it out; then I tried pressing. Upon inspection, it seems as though this is more of a crease...caused by the lining underneath. Ironing over the two different heights of material leaves one section a bit lower than the other causing the wrinkled look. I thought hanging it would make it work its way out. No deal! What to do? Any help is appreciated.

Thanks much!!

Den