Import your midi,
Shift select all the combinators and hit delete. All except tracks.
That'll leave you with your old-school reason look. (midi data without any combinators).
The most common problem with no sound coming out when you've chosen a combinator patch, is simply, the midi information is out of the range of the samples provided in the combinator patch. If you can't find anything suitable or don't know how to control NN-XT etc; Edit and check the piano roll to see the range the patch provides and drag-drop the imported midi sequence into an octave within the range.
Note: You can always create a new rack instrument/sampler and drag-drop the imported sequence to it's lane.
Hope that helps. (probably doesn't)
Last edited by ArtaxUK; 2013-02-20 at 23:30.