keeps failing for comprehsion on 2002 Volvo C70

I have had my car fixed for the fail They have told me to drive it at least 200 miles I have done that and still fails for comprehensive What is the problem

Asked by for the 2002 Volvo C70
These vehicles need to be driven until the engine computer can perform a check of the entire emissions system (called a "Drive Cycle"). Some cars can achieve this in a short time, other take much longer. I suggest you take this to a Volvo shop, they will be able to perform this test drive in a much more efficient manner than you can. Learn more here: http://repairpal.com/Drive-Cycle-Issues
Find a Volvo shop here: http://repairpal.com/directory?address=08812&car_brand_names=Volvo