[XeTeX] \usepackage{fontspec} and \bfseries {text}

[Stefan Pohl]

Hi list-members!

If I use 

\usepackage{fontspec}
\setmainfont{ScalaSansLF-Regular}

instead of \usepackage{cmbright}

the command \bfseries {text} does not work any more.

What do I have to do?

Thank you for your help.

Stefan.