Cant load my scenery files under Windows 7

[Javier]

Hello, I am a FS player since the first version (year +/- 85). I have just to
install windows 7 and naturally, the FSX.

FSX under W7 runs with a great graphics performance, better than XP and, of
course, much better than Vista.

But, when I want to load my habitual scenery files placed in <Addon Scenery>
folder, when i push the <accept> button, open the follow (sub)folder, but no
load the scenery file selected.

Id like to know if somebody experience same problem, or if there is some way
to solve it.

Thank you very much

Javier - Pamplona - Spain