problem when transfer wbxml information between j2me client and j2ee server

Hi,everyone,I am developing a project based on the j2me and j2ee.I 
encounter a problem when I want to use wbxml as the message format 
transfered between the j2me client and servlet.My code follows the code in 
the article "Compressing XML for Faster Wireless Networking" 
(http://developers.sun.com/techtopics/mobility/midp/ttips/compressxml/)


The code of my client is as follows:
 private static final String tagTable[] =
                {
                        "accountInfo",
                        "accountName",
                        "passWord",
                        "personID",
                        "mobilePhone",
                        "e_mail" };

con =(HttpConnection) Connector.open(
        "http://127.0.0.1:28080/webmodule/servlet/account";);
        con.setRequestMethod(HttpConnection.POST);
        out = con.openOutputStream();
        out.flush();
        xmlWriter = new WbxmlWriter(out);
        xmlWriter.setTagTable(0, tagTable);
        xmlWriter.startTag("accountInfo");
        xmlWriter.startTag("accountName");
        xmlWriter.write(accountName);
        xmlWriter.endTag();
          .........................................................

The server code of my server is as follows:
    in request.getInputStream();
    parser = new WbxmlParser(in);
    ParseEvent event = null;
    parser.setTagTable(0, tagTable);
    do {
          try {
                event = parser.read();
                if ((Xml.START_TAG == event.getType())
                        && (event.getName().equalsIgnoreCase("accountName"))) {
                        if (Xml.TEXT == (event = parser.read()).getType()) {
                        accountName = event.getText();
                                        
                }
        }
    ..............................................

But I find that I get an exception when the client trid to send the message 
to the servlet.
The exception information is below:
java.io.IOException: Unexpected EOF
        at org.kxml.wap.WbxmlParser.readByte(Unknown Source)
        at org.kxml.wap.WbxmlParser.readInt(Unknown Source)
        at org.kxml.wap.WbxmlParser.<init>(Unknown Source)
        at server.web.Accountlet.doGet(Accountlet.java:86)
        
I am confused by the exception . So I checked the source code of kXML1.21. 
I think that the problem may be inside the constructor of wbxmlparser.
The code of constructor of wbxmlparser is below:
this.in = in;
        
	version = readByte (); 
	publicIdentifierId = readInt ();  
	
	if (publicIdentifierId == 0) readInt (); 
	
        charSet = readInt (); // skip charset
        

            //Notice the problem may be here
	int strTabSize = readInt ();   

        StringBuffer buf = new StringBuffer (strTabSize);
	    
	for (int i = 0; i < strTabSize; i++) 
	    buf.append ((char) readByte ());

        stringTable = buf.toString ();

The wbxmlwriter only writer three binary number in the constructor:
          out.write (0x01); // version
        out.write (0x01); // unknown or missing public identifier
        out.write (0x04); // iso-8859-1

But the wbxmlparser need more than three binary numbers.So the function 
readByte() called by the function readInt() throws the Exception mentioned 
above.
I don't know the use of strTabSize .It seems the client must write more 
binary number to the stream.
Does anyone can tell me the right code(both the client and the server) to 
transfer wbxml information between client and server? 
Or tell me how to write the code correctly?
Do I really need to learn the knowledge of what the binary number stands 
for(such as 0x01 stands for something ,0x03 stands for something)? I think 
the knowledge of encoding with wbxml should be transparent to the users.

Any idea or suggestion is highly appreciated.
Thank you!
Best regards!
                                                                Benny Young

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