Help Boosting xp values in npctemplate

Hello, i have added the core side for more levels in aCis, but i want now mobs to have more xp, i changed the values to high ones, but as i saw the server atm only has max integer value as  i presume, i changed to double, i have no errors in the server side, but still now i don't get any xp gain.

EXAMPLE:

Normal xp mob gives: 1033874.0 exp value in the server (added logs raw from template)

From the custom value: 6.203244E7

(<set name="exp" val="457010162"/> i want to add something this big.. )

Thanks!

P.s Tried to change in Attackable.java and NpcTemplate ( changed to double values)

Any help apreciated! :)