I know it's been a while since you posted this, but I'm answering in case you didn't work it out or someone else has a similar problem.
Did you install the FRC Tools from the National Instruments DVD before you installed WindRiver? You might want to take a look at
http://www.usfirst.org/uploadedFiles/Robotics_Programs/FRC/Game_and_Season__Info/2011_Assets/Kit_of_Parts/Getting_Started_with_the_2011_FRC_Control_System_R ev_A.pdf.