it won't work with that Custom pack. You need the same one as the FS, so
HB1-06_Gen_CDA102568_104_R5A_GENERIC_HONG_KONG would be the choice.
Also, your phone MUST be CID52, and RED. You can check that simply by plugging it in to XS++, or choosing IDENTIFY with setool2lite.
If its lower than 52, you can upgrade to 52 with XS++ (it will automatically ask to upgrade).
If its 53, then you cant flash with XS++/setool2lite and you cant downgrade as far as i know.