Phantasmic Arrow's knockback

[Ninjamon]

How can i add  Phantasmic Arrow a knock back? As far as i know, most of the server is using a  Phantasmic Arrow with knock back. And it doesn't work on my latest rathena :/

[Ninjamon]

up

[Mystery]

1009,-9,6,1,0,0,0,1,1,no,0,0x1,0,weapon,3,    HT_PHANTASMIC,Phantasmic Arrow

// 15 Blowcount (amount of tiles skill knockbacks)

 

However, 3, indicates that it pushes the target back already 3 cells. Even, according to iRO's Description:

Enables the caster to shoot a magic arrow without requiring actual arrows. Inflicts 150% damage and pushes the enemy 3 cells backward after impact.

 

So by default, the skill already pushes back 3 cells.