If the CCC block starts rebooting, there is a minimum of a change that software updating will help. You have to bring your CCC module to electricians who could overflow some resistors in the scheme because it keeps overheating and as a result of this - rebooting.
I had the same problem on my e60. I was able to fix the problem using ISTA - D. You need to do the cas alignment procedure and connect your ews and ecu modules.