I tried to pair mine during "breeding season" and got the same results you did, but when I put them together last week they locked up on the first night and again when he was done with his 3 day rest. Just keep trying and one thing I'd recommend is to not keep the females tub spotless. Not saying let her poo overrun the place but spot clean and dont scrub her smell away. It seemed a semi-dirty tub was more romantic to my male.

sent from my EVO