Metal Gear CD2

In the snowfield, when Sniper Wolf is died and I pass the stairs to the next level, a message shows me that I must insert the second CD. When I insert the CD2 I supose that I must reset and load the mission in the snowfield, but if I do this another message appears and said that I must insert the CD1. Whats wrong ?. Can you help me pleeeease !!

[hoohah]

After you insert CD2 you will need to save the game at that point. Hope this helps

I only can save when cd CD1 is in the psx because the cd don't stops and I can't change it. When the message that I must insert the CD2 appears, the CD1 stops ( when Snake goes down the stairs ), then I can change the CD to the CD2. But in the screen appears this message until I press all the buttons. Only if I reset the psx desappears, but then when I load the game at the same point appears the message that needs the CD1. ????