CF slot not recognised in USB 3.0 card reader Windows 8

To elaborate, the blue light under the CF slot keeps flashing when the CF card is in it. Lightroom’s Import dialog freezes. The Computer window never shows the card.

If a SDHC card is put in, it shows up instantly.

The CF card is a Sandisk Extreme III 12GB and the SDHC card is a SanDisk Extreme 32GB.