How do you exactly use PS2 back-ups with modchip?

Hi from Spain,

I have a PAL PS2 with modchip. I use the following way for playing back-ups:
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1. I put the AR memory card and CD 1 in my PS2 2, then turn it off.

2. I switch it on by pressing the reset button during around 4 seconds (til the flashing lights appear on screen), then I release the button.

3. AR boots normally. I choose Start game.

4. In the following screen I press the eject button and replace the AR CD with my back-up.

5. I choose start without codes and press x.

6. If everything is OK game boots.
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I'm asking this because lately this method doesn't work every time I try it. I've talked with other people around here and each of them use a different method. I'm asking what's yours and what's the best.

Thanks a lot for your help,

Dani