Hello i recently went from cfw 3.55 to Rogero cex421. I simply did it by placing rogero in the appropriate location of the flash drive and installed it from the xmb sys update. It looked like it installed fine when the system boots up it says rogero, but none of my psn games or apps that were already installed would boot. They would all give the 80010017 error. I uninstalled the multiman that was on there as it wouldn't work either and installed a new one, but it does not work either. I'm curious how to procede. Can i downgrade to ofw3.55 and then install rogero, is that even possible? If you need any more information please let me know. Thank you.