RCN novelas is using an entitlement ID for a key 09 that have never been posted,so is all black for everyone.
RCN sd is working using key 01.
Another RCN sd is using key 06,both keys are posted.
Also,some services using swapped keys,meaning,swap keys 01 with key 02,swap key 03 with 04,swap key 05 with 06.
Not sure why,I have found out some services work this way,like BPL games.
Try it,it might work.