I do have softcam.keys in the same dir etc/tuxbox/config
Your reader config is looking in a different location for the SoftCam.Key file device = /usr/keys/SoftCam.Key
Should be device = /etc/tuxbox/config/SoftCam.Key
Your group = 2 is also wrong
group = 1 is what your [user] is using in ncam.user
Remove the [reader] from ncam.server and try again.
If it doesn`t work try the reader i suggested.