CFileDialog inside CTabCtrl

I have customized CFileDialog. When I use it "normally" (modal dialog)
it works well.
But I need it in a tab of CTabCtrl. In this case the program crash.

The project is:
[url]http://control.dsi.unifi.it/~cialdi/openfile.zip[/url]

I use vc++ 6.0, and I have cut&paste a from
[url]http://www.codeguru.com/Cpp/controls/controls/tabcontrols/article.php/c5239/[/url]
end from
[url]http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q195/0/34.asp&NoWebContent=1&NoWebContent=1[/url]

Any idea to solve the problem?

thanks
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