Scalation upright and across

Hi,
I tried to make my own mobile template and for the detection I use mobile joomla. In upright usage of the phone everthing is ok. If I change to across usage, nothing changes. What do I have to do to get an automatic scalation?

www.praxis-zwanzig.de

Thx
Chris

Just found the problem - I've simply had a wrong width defintion somewhere in my css.