Sandisk extrême speed link at Sata 1 ?

https://discussions.apple.com/thread/2624608?start=0&tstart=0

http://forum.corsair.com/v3/showthread.php?t=104301

http://forum.crucial.com/t5/Solid-State-Drives-SSD/Macbook-Pro-Mid-2009-17-quot-Only-SATA-1-Negotiated-link/td-p/93224

http://forums.macrumors.com/showthread.php?t=1326295

This seems to be a well documented MAC issue. Unfortunately you will need to contact Apple but from what I could find there is no fix for the issue.