Problem  while developing statelesssession bean

Hi All,
I am learning Ejb,i developed a simple hello world application using statelesssession bean in weblogic server8.1.And i packed it in a jar file named slb.jar.
Then i am trying to create stub and skeleton using following command,but i am getting this error.can anybody please help me.
C:\nkmb\ejb\HelloEjb>java weblogic.ejbc slb.jar
<Jun 22, 2006 9:55:35 AM EDT> <Warning> <EJB> <BEA-010212> <The EJB 'HelloBean(J
ar: slb.jar)' contains at least one method without an explicit transaction attri
bute setting. The default transaction attribute of Supports will be used for the
following methods: remote[hello()] >
C:\nkmb\ejb\HelloEjb\ejbcgen\examples\HelloBean_gbyfgg_Impl.java:11: cannot a
ccess java.io.Serializable
bad class file: C:\Program Files\Java\jre1.5.0_06\lib\rt.jar(java/io/Serializabl
e.class)
class file has wrong version 49.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
public final class HelloBean_gbyfgg_Impl
^
1 error
Exec failed .. exiting
can anybody help me to getting out of this problem.
thanks inadvance,
nkmb

http://support.bea.com/application?namespace=askbea&origin=ask_bea_answer.jsp&event=link.view_answer_page_solution&answerpage=solution&page=wlw/S-28139.htm

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    Hi All,
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    nkmb

    http://support.bea.com/application?namespace=askbea&origin=ask_bea_answer.jsp&event=link.view_answer_page_solution&answerpage=solution&page=wlw/S-28139.htm

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