use this item script
30701,Evolved_Pile_Bunker,Evolved Pile Bunker,4,10000,,3000,450,,1,3,0x00000400,8,2,2,3,99,1,8,{if( getskilllv(2251) ){ skill 2257,2; }},{},{}
Not working sir.
I used this item script:
30701,Evolved_Pile_Bunker,Evolved Pile Bunker,5,10000,,3000,450,,1,3,0x00000400,56,2,2,3,99,1,8,{if( getskilllv(2257) ){ skill 2257,3; }},{},{}
I think the one you posted is a typo? (2251 instead of 2257?)
Also the Pile Bunker skill is level 3 so I made skill 2257,3; but still not working even using 2 or 3.