Visit openbox support forum and check what is needed. You have no signature, we don't know what is exact model of your receiver, which emulator is used for sharing, no log-file... We cannot see it through the walls.
So, if Oscam cannot be installed or cccam to be downloaded and replaced, I think, you need the receiver other than Openbox. Maybe, I am mistaken, but seems that your receiver has closed OS. You need linux-based receiver.