Get a second oppinion on probing him first just to rule it out. Also have you cooled him? You dont have to cool to breed but for some males especially virgins it may help. Also another thing you can try is to put him in with another male for a while like 2 weeks. Sometimes it will get the testoserone flowing. I used to do this with my rattlers and cobras when i used to do hots. It worked for them. I would throw like 3 to 4 males in together for a couple weeks and when i would pull em out the would be breeding machines
The hotspot stays the same, but the air temp goes down. And I'd put him with another male, but all I've got on hand is my friend's males, and they both seem ready to wrestle him to death.