Thanks axeljaeger for your time and answers.

The problem off qvfb is solved.
The compiling off Qt-4.1.0 Desktop Edition don't compile qvfb automaticly.
If i start ./configure -qvfb than compiler look first to the pro.files and he find also qvfb.pro.
When i start gmake or make than the compiler don't compile the qvfb.pro file but the rest off tools direktory he compile's.

I have manually compile the qvfb. in the /tmp/qt-x11-opensource-src-4.1.0/tools/qvfb.
I copied the excutable *qvfb to the /usr/local/Trolltech/Qt-4.1.0/bin direktory.
It works now fine
Also thanks for Ipotter.