Hello! My digital friends on the cyberspace,
I need your help in figuring out the cause and finding a solution to the 
following problem.

I have tried to run the examples included in the "Professional Java 2 
Enterprise Edition with BEA Weblogic Server" (abbreviated here as "J2EE 
with BEA WLS").  I did succeed in setting up and running all examples from 
chapter 3 to 8 and the chapter 9's HTML part.  However, I experienced a 
strange thing that I need your help.

I had succefully run chapter 9 and had kept it alive (I did not stop the 
weblogic server which is version 5.1.0 without service pack).  Several 
hours later, I tried to use it again.  However, I found that the program 
did not response to my login (the login to the e-pizza store). It did not 
take new registration, either.  So I stopped the WLS and tried to start it 
again.  However, I experienced the following error:
"An Exception Access violation exception has been detected in native code 
outside the VM.
program counter = 0x670a94b"
The WLS could not start.
I tried to setenv to other chapters which all worked before this 
incidence.  I found the same error occurred for chapter 7 and 8 but not 
the other earlier chapters.
I have no clue why this happened?  Could you please tell me why and how I 
can solve this problem?
Thank you very much!
Shi