HomePort like BaseCamp will see both locked and unlocked img files. Seems like your other maps/charts that are recognized by your device are either unlocked or are official img files unlocked only to the SD they were purchased on. However maybe HXUS039R is not unlocked. You can try unlocking it with gimunlock, you'll find a link behind the spoiler in initial post here: [Only registered and activated users can see links. ]. You can also check if the img files are locked or unlocked using GMapTool:
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