Bought two navionics + cards, one for each unit. The card for the helix 12 down imaging loaded right up and works fine. The card for the helix 12 KVD the first time I tried it said loading charts for about 8 hours. I downloaded the card again and stuck it in there and it says no charts. I updated the depthfinder about two weeks ago and it says it's up to date when I start it up. I also had my girlfriend take the card to her store and she says there is data on the card. I'm thinking it's something with the depth finder. Any body ever had this happen?