Hmm did you copied the files of the original card to the SD2Vita card after formatting it?
If so it really should work than.
But maybe you could try also my configs here
config.txt (just remove the plugins you don't have like repatch,kuio and vsh)
# This file is used as an alternative if ux0:tai/config.txt is not found.
# For users plugins, you must refresh taiHEN from HENkaku Settings for
# changes to take place.
# For kernel plugins, you must reboot for changes to take place.
# henkaku.skprx is hard-coded to load and is not listed here
# main is a special titleid for SceShell
# this is for modifying the version string
# this is for modifying the version string in settings widget
storage_config.txt (I mount the orginal card as uma0 and the SD2Vita as ux0)