"Failed to find the runtime libraries"

I receive a "Failed to find the runtime libraries" error in Netbeans when using the .jar component that was compiled by MATLAB Builder JA 2.0.1 (R2008a) on windows. I searched the solution online, the answer is on

http://www.mathworks.com/support/solutions/en/data/1-78FIKN/index.html?product=MJ

Just add the matlab bin directory to the system PATH, as it instructed. But it didn't work until I restarted the Netbeans IDE.