Sims 3 athletic skill not improving?

I have had The Sims 3 for my laptop for about 6 years and everything has run smoothly. I have a few mods, mostly just outfits and hair. I have a vampire and a fairy and they recently had triplets. The male vampire cannot improve his athletic skill to level 3 no matter how much I work him and I've tried bringing him to an athletic class, resetting the sim, and have had him try working out at the gym, at home, on the television, stereo, etc. Basically I followed all advice already online. He still will not gain skill which is very frustrating because I'm trying to make him an astronaut. The skill for the fairy will go up but not for him. Please help!

eggink2017-01-13T09:08:40Z

Sims 3 Athletic Skill

Shadoepaw2016-05-17T00:08:33Z

My sim had the same problem but with the riding skill, in the end I had to delete her because I couldn't find anything to solve the problem.
It's probably just that one sim, you could get him to clone himself and get a child that's just like him and recreate the sim that way.

Anonymous2016-05-17T04:01:12Z

This is probably just a glitch in the program.