ant build fails

["grobe.org" <ga...@grobe.org>]

i hope this is an acceptable place to make this post, i didn't see an ant users mailing list. what does the following output from running my build file mean: (note: this is from installing the binaries, i did not do a src build)

-----------------------------------------

Buildfile: ./myBuild.xml

BUILD CONFIG ERROR

java.lang.ClassNotFoundException: javax.xml.parsers.SAXParserFactory
 at java.net.URLClassLoader$1.run(URLClassLoader.java, Compiled Code)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java, Compiled Code)
 at java.lang.ClassLoader.loadClass(ClassLoader.java, Compiled Code)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java, Compiled Code)
 at java.lang.ClassLoader.loadClass(ClassLoader.java, Compiled Code)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java, Compiled Code)
 at org.apache.tools.ant.Main.runBuild(Main.java, Compiled Code)
 at org.apache.tools.ant.Main.main(Main.java, Compiled Code)

-----------------------------------------

i've done a previous installation of ant that was successful and made successful builds, now i'm doing another, but get these errors, and i don't think it's anything with the xml file itself.

TIA,

garyg

--- 
What is this talk of 'release'? Klingons do not make software 'releases'. 
Our software 'escapes' leaving a bloody trail of designers and quality 
assurance people in it's wake." - Klingon Programmer