Quest might not be right - he is right!
It´s definitly NOT the cccam.
Nearly every Receiver that´s not based on linux uses the softcam.key als keyfile.

How to install radegast in the SF-image?!

simply load the addon to /usr/local/etc
reboot the box by pressing the power-button no the remote control
radegast is now installed and ready to use!

If you need to update the keyfile take the litte updater which you can find here in this section!