LOL - my cinny was like that I tried every trick in the book since October - all he would do was cower in the corner. Last week I decided one more try with my really big girl - originally didn't want to breed him to her but thought it was worth one last try. Sure enough he locked up with her for over 3 days straight. Soon as we get another rain storm my pastel will be going in with him - hopefully he just needed to get started - otherwise I'm going to assume he will only tap 3000 gram girls.
Good luck!