java/util/HashMap error

[Mathy V Arumugam]

I have posted this que. to the fop-user list and no resp.  Hope someone could help me...

I am using JDK 1.3.0_02 along with javawebserver2.0.

My servlet is failing at
     Driver dr=new Driver();

Error:
 java.lang.NoClassDefFoundError: java/util/HashMap
 at org.apache.fop.fo.FOTreeBuilder.<init>(FOTreeBuilder.java:85)

Thanks
Mathy

This is what I have in my java file to generate a PDF file:
    Logger log;
    Hierarchy hierarchy = Hierarchy.getDefaultHierarchy();
    log = hierarchy.getLoggerFor("fop");
    log.setPriority(Priority.WARN);
    Driver dr=new Driver();    // *****  this is where it is failing******
    dr.setLogger(log);
    dr.setRenderer(Driver.RENDER_PDF);
    InputHandler ih=new XSLTInputHandler(xmlFile,xslFile);
    XMLReader p=ih.getParser();
    dr.setOutputStream(new FileOutputStream(pdfFile));
    dr.render(p,ih.getInputSource());