I have a brand new Crimson DS Lite and also got an R4. It is the newer version, with no spring. However, when I put it in the DS, I get the message "There is no DS card inserted." I tried the same R4 in a friend's old DS phat, and it worked like a charm there. Any idea what the problem could be? I blew out (with compressed air) the slot 1 area, but it still refuses to acknowledge the card. All other cartridges work fine. Could it have anything to do with the lack of guides? On all other slot 1 cards, there are plastic guides next to the pins, but my R4 lacks them. Is that normal for R4s? Thanks for any help!