Okay! Make sure you putting the .fho files into: FeralHeart>>Media>>Objects
If that still doesn't work(Or if you've been doing that, then I think I know what has happened.)
When you were putting the files in my_objects were you pressing replace?? If so that could be why it's not working try pressing 'Make a Copy.' Or 'Skip File'. That's all I could really think of that could have went wrong, sorry.