在PHPUnderControl中使用Ant会产生java.lang.NoClassDefFoundError

I've installed the latest CruiseControl and PHPUnderControl, and followed all the directions. I get stuck at running "../../apache-ant-1.7.0/bin/ant checkout" and get the output below. Searching for the error on Google, it was suggested to add the JVM path to the Ant script, but this did not change anything.I've installed the latest CruiseControl and PHP