too complicated for me. I have re-downloaded miktex 2.9 x64 Net installer one last time and downloaded and installed all packages doing a complete miktex installation without interruptions and now xelatex works perfectly (the graphics and axes even show up). I also changed my PDF viewer to adobe reader instead of adobe acrobat. I don't know if the installation OR the pdf viewer made the difference. The conclusion is that it is working now. Thanks for all your help.<br>