2013 ram 1500 CC tradesman. upgraded my radio from a 2013 RA1 to 2015 RA2 for the Bluetooth handsfree option. Took to dealership and ordered a backup camera kit for radio screen and had them do the install, They have had the truck now for 3 days and yet to get the camera install to show up on the radio screen. no blue screen just a blank screen when they put truck in reverse. They say they have flashed with sales codes, XAC codes etc. 3 different tech involved. 1 tech said he had to go back in and do some corrections on the install. Going down in the morning. Could it be the radio just not compatible. No updates to SW because I don't have the vin # the radio came out of. Any suggestions.