Hi guys, I have the same your problems with CI module.
I have written to DMM. Mr. S**eller has said to send the box for a fix.
3 months later my 7020SI work as before (ever frezees with all cam).
I have seen only that they has replaced the modem.
My dreambox have number 0643 and REV. M [2006]
A new rev that works well with the cams does exist?
420 euro for a decoder that doesn't support the cams!!!
Thank a lot