The build shouldn't make a difference, just that the modules already set are available. I just use basic helios.
Install the zend debugger fully, and try using it instead.
BTW, if it helps, this would be what I'm using. The eclipse PHP developer plugin and the zend debugger.:
Eclipse IDE for PHP Developers 18.104.22.16800617-0520 epp.package.php
Zend Debugger Feature 5.3.18.v20100603 org.zend.php.debug_feature.feature.group