(I used evolve editor pro, could that be the problem?)
What can i do to fix it?
That's a feature left over from the retail version of FR/LG. Pokemon from outside of the original 151 won't evolve unless you have the National Dex upgrade - This is to prevent you from getting Pokemon like Crobat or Blissey before you beat the game. To activate the National Dex you have to put the command 'special 0x16F' in the script where you get your Pokedex and all of your Pokemon will be able to evolve freely.