Make sure the java command exists in the system path if not, you will need to modify the file conf/nf under the build agent's installation directory, and point the entry to path of the java command.Download the appropriate JDK version from if needed. For Sun JDK5, QuickBuild requires at least update 19. Make sure you have JDK5 or JDK6 installed.Extract downloaded file into the directory where the build agent should be installed. Make sure QuickBuild server is up and running, login to QuickBuild as administrator and navigate to Grid tab, click the the link download build agent to download build agent of desired platform.