Micro SD card problems


No Stranger To Love
Well, I've had this Micro SD card for a couple weeks now. Worked great and all. But, just a couple minutes ago, I put it in my SD Card adapter, as usual, but my computer is telling me to format my SD Card. Oddly enough, my DS Flashcart reads the Micro SD cart just fine (But Moonshell isn't working either).

Well, how can I fix this? Do I need to format it?
It seems like the adapter itself is the problem, or the SD Card reader on my laptop sucks. I've tried using a Kingston Micro SD USB Adapter and it works just fine.