I need to put in COS 3 but when I try to upload/download into the car the reprogram tables won't highlight. I followed the instructions in the help menue to a T and it won't do it. What am I missing. I looked at my stock OS and found the matching COS number in the COS file. I clicked on the correct COS3 file and opened it. When I went to load it in the car it wouldn't do it. I really need the COS due to my very large cam. The bucking is driving me nuts. Nothing else is working and I am pretty positive it is fuel now. Please help.