I guess what source you were using so you might have to change the code a little.
Find where all your special's are kept in client.java and look for the weapon[b] 861[/b].
and replace it with this (u might have to change it a little):
if(playerEquipment[playerWeapon] == 861 && specialAmount > 74 && specOn && AttackingOn2.currentHealth > 0){
specialAtk(true, 75, 256, 1074);
hitDiff = misc.random(maxRangeHit()) + misc.random(3);
rangeGFX(75, 249);
rangeGFX(95, 249);
specAttack();
actionInterval = getbattleTimer();
lastAction = System.currentTimeMillis();
usingSpecial = true;
}
NOTE: the first 2 lines are only 1 line.