Servlet Deploy in Eclipse

When i click on properpties>Run Package of perticular project which contains servlet class i am getting

following Exception, How to slove it.

Buildfile: D:\workspace\helloworld\packaging-build.xml

BUILD FAILED: Unable to load default ProjectHelper due to java.lang.NoClassDefFoundError: org/xml/sax/SAXParseException

Total time: 125 milliseconds

Thankyou.

[416 byte] By [ansssss] at [2007-9-30 13:02:05]
# 1

I had this problem. I was running the Ant Build under JDK 1.3.1 when I thought it was running under JDK 1.4.2. Remember that JDK 1.3.1 doesn't include the XML APIs.

To fix, open up the Run, Debug or External Tools configuration that you're having problems with. Then click on the "JRE" tab. From here you can change the Java Runtime that the process is running under.

Alternatively, if you really want to run under JDK 1.3.1, add xml-apis and xerces jars to the classpath using this interface.

dave@daveboden.com at 2007-7-4 17:41:25 > top of Java-index,Enterprise & Remote Computing,AVK Portability...