Can someone help plz

[sabotage3d]

Ok I am trying to resend a simple message packet to WoW with Wpe pro and it gives me succesful but the server broke the connection with the game and disconnects me after 1 min or so I am talking about live servers and I know that it is normal it has somkind of security or something that numerous people has bypassed but can someone tell me what exactly is veryfing the packets as it has to be the same as I wrote I just resend a packet that is already created from the game nothing fansy.