Download the oscam plugin from plugin's
FTP your oscam.server file to replace the one that was downloaded by plugin
Restart oscam plugin you may need to restart box
Worked for me
The only oscam plugin I could find was within the emu section of the plugins. There where 3 different oscam files there and I downloaded all 3. When I go into the softcam control section of HDMU centre I can see the 3 of them there but when I ftp'd the oscam.server file to replace the one that was already in the var/keys folder and I rebooted nothing happened.