I've tried everything to get my True Percula to make a home in my rose anemone. I've tried the picture of a hosting RBTA. I've tried feeding them food only in the RBTA. I've tried the picture of a lionfish to scare them in to the RBTA.
In the end, it took patience. After about 4 months of being together the male perc got curious and 'dove in.' The female dove in a week later and now they love their new home.
I wish you luck, but after a while I was almost going to give it up and succumb to the fact that they will not have symbiotic relationship. My patience paid off when the clowns finally discovered the RBTA.