case SLEEP:
    		mAtk = player.getMAtk(target, skill);
    		mDef = target.getMDef(player, skill);
    		value = 30 * 100 + (int)(70 * 100 * ((float)skill.getLevel()/maxLevel));
    		mDef = target.calcStat(Stats.SLEEP_RES,mDef,target,null);
    		if (mDef > 0 && mAtk > 0)
    			value *= 0.6 * mAtk/mDef;
    		modifier    = 100 * target.getWIT()/15;
    		//_log.fine(player.getName()+" matk:"+mAtk+",mdef="+mDef+",value="+value+",modifier="+modifier+",maxlevel="+maxLevel+",level="+skill.getLevel());
    		break;

............................

        if (modifier == 0)
        {
            _log.warning("Name: "+target.getName()+" has bad base stat value. Fix datapack or notify dp ppl");
            modifier = 1;
        }

        rate = ((player.getLevel() - target.getLevel()) + (int)(value / modifier));
        //_log.fine(player.getName()+" rate:"+rate);

    	if (rate > 100) rate = 100;
    	else if (rate < 0)
    		rate = 0;

    	if (check > rate) success = false;
    	else success = true;

    	return success;