After a lovely afternoon of playing with my R4 and picking stuff to put on my SD I got something of a fright when my DS stopped detecting the R4; like there was nothing in the slot at all. I tested with a normal cart and this booted fine. I noticed that if I held the R4 in, then the DS did in fact see it fine. So I dug out a very small screwdriver and swapped the R4 into the spare casing and I was very relieved to find that the DS could see it again, even without me holding it in. Being a curious sort I then swapped it back in to the first casing, and wierdly it is working fine again. Maybe popping it out of the casing a reseating it would have done the trick? Seems like it wasn't sitting quite right, and not making a full connection with the DS. Anyway I thought I'd post incase anyone has this sort of trouble. nevermind, back to playing now!!