I have a RS Pro-528 that i am programming with a PC using the Butel ARC433 programming for the RS Pro 433 / 528 and on this unit it does not recognize this scanner. It comes up with a error message and it will not up load or down load the information . I've have use this same program to program 4 or 5 other pro-528 without a problem .Any suggestion. Thanks for the help Steven