Hi, I've a UE55D8000 and I couldnt get the MCA to work at all with DVB-C Irdeto2.
I haven't tried DVB-S2 yet though.
The MCA is a bit picky on which TV you put it in.
For Samsung you could try an alternative firmware for the Xilinx chip (MLC_Rev2a) but in my case it didn't made a difference at all.
The card works fine now, except that it hangs every 10 seconds on encrypted channels.
I think this is because I am using an older version of OSCAM. I am using 1.00-unstable and I think the latest is 1.20.