Does launching CFW on sysMMC work?
I'm assuming you are using Atmosphere. The developers of Atmosphere are strictly anti-piracy so installing any pirated content with vanilla Atmosphere will not work. You need to add special patches in order to be able to install and launch pirated backups. You can download them from this
thread.
SX OS is dead so you should consider moving to Atmosphere. Atmosphere may even be able to boot up your console. Also, ChoiDujour only supports up to firmware 6.1. Its even stated
here.