ANT version used by Jazz Build Engine

Hi

I have RTC 2.0.0.1 with Build toolkit installed. I installed Apache ANT 1.7.1 on the RTC server. Environment variable ANT_HOME is set on the RTC server to point to the path for ANT 1.7.1 and the Path variable on the server includes the installation location for ANT 1.7.1. In the build definition, ANT tab the ANT home variable is set to ANT 1.7.1 installation location.

When the build is executed the log file indicates it's using Apache Ant version 1.6.5. Why does the build engine use a different version of ANT ? How can I change the build engine to use ANT 1.7.1 ? Any help is greatly appreciated.

Thanks
NP