3dscapture.com

Do the USB ports on your computer work?
Have you tested it on another computer?

Does your computer notice that it's plugged in? (Does it make the "usb connect" sound?) Do you see it in Device Manager? What kind of computer is this? What OS?

Yes.

Hard to say for sure without looking at it. My guess is either the connector, or the cable for the circle pad is damaged.

Have you tried using a different cable?

For the capture card shell? Give me your address, I can send some.

I'll just cut-n-paste my last response. Is it always glitching out or just while you're recording? Or only with certain games? Test it on another computer if you can. Test it without a webcam / USB microphone plugged in. Try switching to a different USB port. If you're using a Mac with virtualizatio...

You're right. It appears there are no XP drivers for New3DSXL boards.
There isn't going to be a "fix", XP isn't supported at all for this chip. (FTDI driver page)
Sorry about that. I've corrected the front page to say Win7 or newer.

How did you get 3DS capture to work? It's the same thing, just a different VID:PID.