I have 2 blogs running and in both of them I have installed the very good contact form from here: http://ryanduff.net/projects/wp-contactform/
in this blog it works very well: http://www.swingcheese.de and in this one
http://www.swingcheese.net it doesn' t work.
If someone could try it out and have an idea... because I can' t explain it.
Thank you and cheers,