Cant make exp harder after 1k

[KingOfKings]

does anyone know how to make exp harder after 1evel 1001?
Server exp is set to x64

985=500000000000
986=500000000000
987=500000000000
988=500000000000
989=500000000000
990=500000000000
991=500000000000
992=500000000000
993=500000000000
994=500000000000
995=500000000000
996=500000000000
997=500000000000
998=500000000000
999=500000000000
1000=500000000000
1001=500000000000

I cannot edit the exp after 1001 to make it harder for some reason

 

[Kaori]

make 1001 harder? than 1002 will follow 1001?