Win7 x64 "WPD FileSystem" & RF-CRDRD card reader

Hi - I just installed one of those internal multi-format card readers in my Windows 7 Ultimate x64 based PC. The card reader is a four slot type Rocketfish "RF-CRDRD" and was the only one I found in the store that supported Windows 7.

I have unexpected results with this card reader. A CF card introduced to the reader will show up as say drive "G" and an SDHC card will show show up as drive "H". If i insert a micro SD card, it does not show up. Removing the both SDHC and micro SD cards and then reinserting the micro SD card will finally display the microSD card. Is this reader unable to display both SD and micro SD cards at the same time - or is it an issue with the driver?

The device manager shows a new hardware type called "Portable Devices" and under it are "normal" icons indicating two drives "G:\" and "H:\". There are 3 additional icons that are identical but have a yellow triangle & exclamation point on top indicating a problem, below drives G and H. All three of these have a description: "WPD FileSystem Volume Driver" instead of a drive letter like G and H above it. I've uninstalled and disabled, reinstalled, updated, rebooted and let the system reinstall - all with no luck.

Any ideas? Thanks in advance!