[Click] ARPQuerier sintax

[Romano Battiti]

Hi,
I’m quite a newbie with Click and I have a problem with the ARPQuerier 
element.
According to the example in the documentation I have to write the code like 
this: c :: Classifier(12/0806 20/0002, 12/0800, ...);
   a :: ARPQuerier(18.26.4.24, 00:00:C0:AE:67:EF);
   c[0] -> a[1];
   c[1] –> etcetera -> a[0];
   a[0] –> etcetera -> ToDevice(eth0);
But when I launch a configuration in the shell I receive always an error 
message like “Output ports are ignored at line X” where X are the lines where 
I’m pointing to the inputs ports (in the example above lines 3 and 4).
Could anybody help me?
Thanks from Italy
Romano Battiti