Hi,
you didn't mention if you were upgrading an FMC or FTD but I'm assuming that it was your FMC, as that needs to be done first. Is it a virtual FMC?
When upgrading beyond 6.2.3 it's recommended to upgrade the FMC's memory to 32GB, the minimum being 28GB.
I would also upgrade directly to 6.6.5, being the "Gold Star" suggested release by Cisco but if you need to use 6.4.0-113 and it still isn't getting past 22% with a memory upgrade to 32GB then I would raise a TAC case with Cisco. They'll be able to look at the logs etc and determine the problem directly.