Odd, are you sure you're putting the 0.25 not .25 etc
It works for me everytime, and i've made like, 9 different randomized roms now
If it doesn't work, why not give 1.25 a try (prolly won't work, but trial and error, ya know?)
Edit: If you decide to use my method on a rom that has already been editted (already has level 100 trainers) then my method will not work. You will need a clean set of trainers that are at their original levels.