After reading both your old and new questions, I'm a bit confused in what youre actually trying to describe. You seem to mix the terms query and DCC as if they are the same thing; a private query msg and a DCC chat are 2 completley different actions with very little in common. If you really mean that you can initiate a DCC send/chat but can not receive either a DCC Chat nor recv a priv query msg, then you should look in your ignore list Alt+B control tab, for a global ignore that would effect both.
