Hmm - Java 1.4 does not have a org.w3c.dom.ls package - it only has org.w3c.dom - this indicates to me that your program requires a special library which you appear to have on your work station but not on the server.
A google search for "DOMImplementationLS" surprised me! It appears that this class is in the Java 1.5 standard library and in a variety of other places.
Here is a quote from the Java 1.5 page:
DOMImplementationLS contains the factory methods for creating Load and Save objects.
I think
you should look around the results of searching for DOMImplementationLS to see if you recognize anything related to your project.
Bill