INN2 basic question

I am trying to add a nntp peer to my server. Whenever I am reloading newsfeeds (or just restart the server) with the entry for this peer uncommented
e.g.
testserver/testserver.org\
        :*,!junk,!control,!control.*/!local\
        :Af,Ap,C20,G12,U5,<32768,Tm\
        :innfeed!
it gives me the error "testserver funnel bad" in the log.
Now I changed this entry in about half a dozen ways and it always comes back to the same error, so I think despite it being triggered by the newsfeeds entry that's not the cause.
Anyone got a hint where I should have a look at?