[Kingly_Krab]

Try this:

sub EVENT_LEVEL_UP {
    if ($ulevel < 51) {
        $client->AddAAPoints(2);
    }
}

Edit: You were missing a { on the subroutine at the top and missing a > on $client->AddAAPoints.

Edit 2: This is Perl, not Lua, I didn't notice you said you were putting it in a Lua file.