Problem with Key Changer

Hi,
I'am quite new to this forum and my english isn't the best one so excuse me if I make a mistake.
So i got a global ban from Battle eye because i used a detected dayz navigator...
I decided to use a keychanger because i found a thread here in the forum where someone gave away free arma 2 combined operation keys.
First i downloaded the keychanger from this thread -> http://www.mpgh.net/forum/624-dayz-h...y-changer.html .
I tried to change the my old key with the changer, but when i want to join a dayz server it says "Bad serial number given in Setup". I thought ok the key is used already i tried every code but no one worked. So i downloaded the key changer/ban checker from Darky. I checked if the codes are already in use. Just 2 of the keys aren't in use so i tried to change the key with the key changer from Darky, but when i join a dayz server it says:
"Files D:/ARMA/Bohemia Interactive/expansion/addons/air,animal,anima or ca-e whatever are not signed by a key accepted by this server".
Could somebody help me ?

hey mate if you are using the keys that are in my post i have to tell to you that those keys are INVALID, if you read, you must use it just TO TEST IN NO CD KEY SERVERS AND with KEYSTEALERS!!!

The keys you found are probable fake! I can sort you out if you need