I haven't used raw in a while but if I remember correctly I had to (in cs3 ex) go to bridge>file>open with camera raw. From there I could adjust the photo, I could then close it or have it open in ps.
I found a free update for CS4 camera raw (vs 5.7): http://www.adobe.com/support/downloads/detail.jsp?ftpID=4683
If you don't have it you might want to look into the free Adobe DNG converter: http://www.adobe.com/products/dng/
Don't know if you have windows or mac version, make sure that you get the right download version.
Hope it helps and takes care of your problem, John