[zDevon]

There is an exclamation mark instead of an equals sign in your OnPlayerGiveDamage.

pawn Code:

public OnPlayerGiveDamage(playerid, damagedid, Float: amount, weaponid)
{
    if(gTeam[playerid] == TEAM_COP || TEAM_ARMY)
    {
    }
    if(gTeam[playerid] == TEAM_COP || TEAM_ARMY)
    {
        if(GetPlayerWantedLevel(playerid) == 0)
        {
            SetPlayerWantedLevel(playerid,1);
            SendClientMessage(playerid,COLOR_RED,"You are now wanted player ! ");
            SetPlayerColor(playerid,COLOR_PURPLE);
        }
    }
    else
    {
    }
    return 1;
}

Edit: You found it.