OK well there is no Mass Kill on this site that is NOT OUTDATED . If you got it from here (MPGH) it will not work due to being outdated.
We also need to know what injector you are ting to use
If you got the "hack" from a different site you will need to ask the creator why its not working (but most likely a Virus or Trojan! if so CHANGE YOUR PASSWORD AS SOON AS YOU CAN odds are you where hacked).