java.lang.NoSuchFieldError: name org.slf4j.impl.Log4jLoggerAdapter.(Log4jLoggerAdapter.java

problem: AnnotationConfiguration cfg = new AnnotationConfiguration(); fails
and javax.servlet.ServletException: Servlet.init() for servlet PersistentController threw exception
java.lang.NoSuchFieldError: name
    org.slf4j.impl.Log4jLoggerAdapter.<init>(Log4jLoggerAdapter.java:75)
   
solution: download a new http://www.slf4j.org/dist/slf4j-1.5.2.tar.gz
(having multiple javassist.jar doesn’t matter)
http://groups.google.com/group/comp.lang.java.programmer/browse_thread/thread/c6d647699b02fb5e/becc5c738902506b?tvc=2#becc5c738902506b