[oliverrud]

pawn Код:

if(newkeys == KEY_SECONDARY_ATTACK)
     {
         if (IsPlayerInArea(playerid, 1524.33, -2279.55, 1709.12, -2384.77))
       {
            SendClientMessage(playerid, COLOR_LIGHTBLUE,"Esti in safe zone");
            return 1;
       }
     }

If this doesn't work then your using wrong coordinates.