Monster Hunter Portable 3rd HD

[Micon123]

I have a bit of a problem with the defence multiplier when i turn it on i can see that it change my defense on the status option but when i go to hunt a monster the damage delt by a monster is the same. i hope someone could help me
here is the code:
_C0 Defense x2
_L 0x200A81B8 0x00021040
_L 0x200A81C0 0xA62202D4
_C0 Defense x4
_L 0x200A81B8 0x00021080
_L 0x200A81C0 0xA62202D4