I'm also glad to report success!
The only thing I had to change was the metric/american style because
putting m or s in the parameters doesn't work.
I added "&unit=m" to the code.
Now I can see the temperature in Celsius, only the wind speed comes still
in m/h instead of km/h and the pressure also don't come in metric units.
Does anyone knows how to solve this ?
Thank to ALL !

Fischi