hi,
yes that was the problem. THX for your help Puybaret!
download as first SweetHome3D-4.0.jar not forget those!
I just made ​​a start.bat with this content:
"
@ echo off
Java -Xmx4096m -jar "C:\Program Files (x86)\SweetHome3D\SweetHome3D-4.0.jar"
exit
"
and again a problem lass in this world [:)>-] [:D]
Peter