Help with Java Connector integration

Hi,

I am using WAS v6.1 with JAVA on windows platform, I am working on a mail system. I've integrated the FCKeditor into the system, but when I wanted to integrate the JAVA connector and added the code to web.xml(http://java.fckeditor.net/connector.html) I found that although the server still can be started , but there are some problems
[8/29/08 14:51:42:912 CST] 0000003c SystemErr R 10 [Thread-71] INFO net.fckeditor.handlers.PropertiesLoader - fckeditor.properties loaded successfully!
[8/29/08 14:51:42:912 CST] 0000003c SystemErr R 10 [Thread-71] INFO net.fckeditor.connector.ConnectorServlet - ConnectorServlet successfully initialized!
and The server cannot load the pages "HTTP 404 not found"

In fact I can run the server properly before I added the code to web.xml , Is that the Java core - 2.4 not supported by my server ? or something else ?

Please help me !!

Junior