Hello! It's my first time posting here but not the first time I've found a solution on here though. I recently purchased 2 sabrent USB 2.0 internal card readers. I installed it into the USB header on my motherboard, and turned the computer on, and the card reader only reads what ever is plugged into the USB port and not any of the card slots. Any suggestions? I'm running Windows 7.
Have you checked to see that the card reader is being recognized in Device Manager? If there is a driver problem it will probably have a caution sign (yellow triangle with exclamation point) when you see it in Device Manager.