Of course Paul.
problem
My nunchuck dont work with the complimentary filter code
I cant get readings => problems with the Ic2 Communications
Suggestion
as mention by crimony, "Wii "Extension Controllers" other than the original Nunchuck have an initialisation sequence which differs from the one found in the nunchuck library originally designed by Tim Hirzel"
I succesfully manage to change the nunchuck_funcs.h library done by todbot. So the nunchuck works fine.. just different 
So I think my problem is in the initialisation sequence
. I've tryed the same approach but cant get it to work on the complimentary filter code.
Summary
Change the initialisation sequence in this thread http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1253202298/0 to crimonys solution above