It not being WD may be an issue. WD doesn't have any support for SATA controllers on their website. If it's an SIIG or the other one they list, he can check those sites for updated drivers.
Also, he may need to go into the cards configuration and set it for 1 drive. If the card is being detected and is working and he just can't see the drive, that's a step that WD actually lists on their website.