At three Mn of pist with ref speed having make before Loc APproachand CMD B,my plane suddenly go up (i am in descent alignez on loc and glide)In a french review"microsim november 2003) it says"instability in vertical plan in approach ILS automatic" Thank you for your help

Jaques,It's hard to tell what you're doing wrong with this little information. But a guess is that you are coming in too slow, or with to little flaps, or with too much weight. A couple of screenshots would be nice. Preferably your Main panel, and your APPROACH REF page on the CDU.As far as the "instability in vertical plan in approach ILS automatic" goes. I think this is piloting error by the reviewer. Can you give us a link to the review?Hope it helps,PS: You might want to address this problem in french as well. I'm sure someone more knowledgeable in both the NG and french can help you out better! ;-)