Color management

Hi Everyone;
Can someone tell me what the best way is to go about color proofing and matching for our QMDI Plus press? What the customer sees as a so called match print from our Canon w6400 inkjet or Canon 3200 color digital is not close to what is imaged on the press. How can we resolve this. Photographs are always just a little to dark. Colors are always just a little to dark. We can get away with it on most colors but,for example, greens, blues we have a terrible time trying to match. Im sure someone has found a solution. Printer, Program? Any suggestion would be helpful.