I am running Windows 7 32 bit and I'm having trouble with two out of three of my cardreaders after a new build (ASUS P8P67 Deluxe). The cardreader in my Canon MP960 has worked fine for several years using the same version of Windows in my previous build. Now, the drive shows up with a letter assigned, but the card is not detected when inserted. The same thing happens with my Sony MRW620 internal cardreader. The USB port on the internal reader works so I know it is connected to the MB correctly.
One more piece of data: If I plug my six year old SanDisk card reader in to a USB port, it reads my cards just fine.
Any help would be greatly appreciated!