All connections are lost in SQL Developer 1.5

Windows XP - SP2
Install Oracle Developer 1.5 today on my XP box. I don't have any old version of Oracle Developer installed before.
I created some connections and able to do some query against some database. Then, I close Oracle SQL Developer. When I relaunch it again, I found all the connections I have created are lost. When I try to recreate any connection, it failed and I see lots of java error by view "Logging Page - Log" tab. Not sure, how to copy and paste those log information.
Since I can't create any connections, I can't use SQL Developer 1.5 anymore. I have to reinstall it again.
Can anyone help?
Thanks!
Kevin

I have posted an announcement with the workaround for this problem, but I'll go ahead and duplicate them here :)
We have identified an issue with loading connections in SQL Developer 1.5. The symptoms of the problem are a failure to load previously defined connections in the Connections navigator coupled with errors displayed in the Logging Page related to severe problems initializing the JNDI context.
There are two known workarounds to this issue. The first is to install and use JDK 6.0 update 6 (or later). This may require removing the jdk directory from the SQL Developer install and/or editing the sqldeveloper.conf file to remove any references to a Java Home.
The second workaround is to modify the sqldeveloper.conf file to add some libraries to the classpath. These libraries are currently being added to the classpath by one or more extensions; however, adding them to the sqldeveloper.conf file will ensure they get added in the correct order. Add the following lines:
AddJavaLibFile ../../lib/java/api/jaxb-api.jar
AddJavaLibFile ../../lib/java/api/jsr173_api.jar
AddJavaLibFile ../../j2ee/home/lib/activation.jar
AddJavaLibFile ../../lib/java/shared/sun.jaxb/2.0/jaxb-xjc.jar
AddJavaLibFile ../../lib/java/shared/sun.jaxb/2.0/jaxb-impl.jar
AddJavaLibFile ../../lib/java/shared/sun.jaxb/2.0/jaxb1-impl.jar
- John
SQL Developer Team

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