Using setViewRect to locate a particular are in a PDF

Hello,
We have a Delphi application in which we are using a TAcroPDF component.
With Acrobat 9 Pro, when we need to locate a particular area in a PDF we use the function setViewRect(left, top, width, height) . Since we updated to Acrobat Reader X, the setViewRect function does not work properly. The vertical scrollbar does not move for whatever the values given as parameters in the setViewRect function.
Also, we notice that if we change regional settings to EN, we also have a different behaviour.
Could you please help us to be able to locate a particular area in a given PDF ?
Thanks

Thank you.  At this point I guess our only hope is that it's sitting on a shelf somewhere at the house and my kid and my dad are just terrible at finding things.

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