Dell Vostro 1710 SD Card Reader problem on Windows 7 64bits

I have a problem with my SD card reader on my Dell Vostro 1710 laptop :

After installing the appropriate driver, my SD reader still does not work, or rather, not completely. Let me explain: When I insert an SD card, I can not view it, and the computer does not seem to recognize it (no display anywhere) BUT the computer emits the sound of a device removed when I remove the SD card.

Another thing: If I insert a Micro SD adapter with a micro SD card that has been previously recognized by the computer (via a USB adapter, for example, because the SD slot does not) it works! But if it's a micro SD as the computer does not know it does not work.

For information, the driver for "O2Micro Integrated MMC SD controller" and "O2Micro Integrated MS / MSPRO / xD controller" is the same for windows 7 32bit and 64bit (it chose the right version at install) but it worked under 32bit before I reinstall Windows 7 64bit.

So, could someone help me?