Alien3 SNES push button cheats, how to make them work?

[Meathead320]

Hi all,

I recently got a copy of Aliens for the old SNES, and I have played through the game, now would like to play through it with a few cheats on, and cannot get this to work:



B - Push-Button Cheats
----------------------

You will need two controllers to perform these.  While playing the game (do not
pause the game), on controller 2 press A,B,Y,X.  Do not hold them down, but
press them in that order.

Then with controller 1, press A for invincibility, B to increase the damage
dealt to the aliens, or X to give yourself infinite ammo.

You can use all of these cheats at one time, but they must be entered
separately.

Here they are again, just to simplify things:

Controller 2        Controller 1
-------------------------------------------

  A,B,Y,X   then    A for invincibility
  A,B,Y,X   then    B for increased damage
  A,B,Y,X   then    X infinite ammo




Does anyone here have experience with using this cheat? Am I hitting the buttons too fast, too slow?

Or are these just bogus cheats