Younger cat wouldn't poo in amber stage

[danab24]

Hi there,
We have been using LK for some time now, since October 2011, with 2 cats: the older one is Doobie, 10 years old male and Papa, 1 year old male. The cats are really good friends to each other. While we thought it will be easier for the younger one, it turns out to be much faster with the older one, Doobie. Right now, we are in the amber stage for more than 6 months. Doobie pee and poo just right. Unfortunately, Papa is still struggling, he pees right in the hole with no problem, but poos on the floor. Whenever we see him go we do the "potty dance" we place him on the LK and it works, sometimes even speaking to him makes him clime up and do it right. But whenever we're not around we does it on the floor again. He usually does it real quick and we don't get a chance to act. We thought we might try to close the bathroom door so we can control the times he gets in there, but it could be a problem when we're not home. We also thought we could go back to red stage, but we feel it would be a waste because it will hold back the older cat.
We only have one bathroom in our apartment.
We could really appreciate some help...

Dana & Valentin,
Israel

[Kimura]

Have you tried the cardboard/cutting board method?

http://www.litterkwitter.com/forums/...?t=3095&page=3

Whole post of suggestions there.. hopefully something can help!