Goodyera

Has anyone grown Goodyera seedlings in a greenhouse environment?

We germinated seeds of Goodyera in tissue culture with great success. Once they had 3 to 4 leaves in a test tube, we planted them in the greenhouse. However, they rapidly declined. We have tried planting them both in our usual potting mix (containing compost and topsoil) and New Zealand sphagnum moss. Any thoughts or suggestions?