OCC beginner getting an empty GUI debuging samples

Hi friends

I'm using VS2008 with OCC 6.3.0 library. When I build the samples tutorial.sln, I got no errors.
When I debug it, instead of having a window showing the bottle, I get an empty Qt-GUI window with a lot of buttons (MNU_FILE, MNU_VIEW, MNU_HELP, MNU_NEW and MNU_ABOUT).

I already saw this topic
http://www.opencascade.org/org/forum/thread_17441/
but It didn't explain how to solve my problem using visual studio 2008 on window XP.

I put these variables:
JAVAHOME=C:\Java\jdk1.6.0_20
CASROOT=D:\logiciels\OpenCASCADE_win32\win32\ros
TCLLIBPATH=C:\Tcl\lib
TCL_LIBRARY=C:\Tcl\lib\tcl8.5
TK_LIBRARY=C:\Tcl\lib\tk8.5
TIX_LIBRARY=C:\Tcl\lib\tix8.2
PATH=D:\logiciels\OpenCASCADE_win32\win32\3rdparty\win32\vs;D:\logiciels\OpenCASCADE_win32\win32\3rdparty\win32\tcltk\bin;
D:\logiciels\OpenCASCADE_win32\win32\ros\win32\bin;C:\Tcl\bin;c:\program files\miktex 2.7\miktex\bin;
c:\windows\system32;
c:\windows;
c:\windows\system32\wbem;
c:\program files\intel\dmix;
c:\program files\microsoft sql server\90\tools\bin\;
c:\program files\mysql\mysql server 5.0\bin;
D:\Program Files\bin\win32;
%QTDIR%\bin\;%QTDIR%\lib\;
%CASROOT%\win32\dll;
%CASROOT%\..\3rdparty\win32\tcltk\bin;
%Path%

Please someone can help me ? I really don't succeed in finding an answer to my problem. thank you very much for your time

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