OK - are you trying to run it from internal or external hard drive? What device / what payload (HEX file) are you using for JB? What Backup Manager? Are you trying to run it directly from Backup Manager or from XMB after selecting it in the Backup Manager? Have you tried the direct load from USB device (not using the Backup Manager at all)?
As already mentioned above - read this thread for a help regards installing the updates on JB-ed games and post your eventual questions or findings there: