Integrated Weblogic Server Domain

I was developing an application on JDeveloper 11g and deploying it on intergrated weblogic server. In my application i was authenticating using my own authentication provider but when i configured it on weblogic, weblogic failed to start. I was not finding any configuration file where i can revert security settings of weblogic but after some try i found it and thought to share it with others. When you install JDeveloper on windows, it places configuration files under "C:\Documents and Settings\user_name\Application Data\JDeveloper". Here you can find all settings for jdeveloper and integrated weblogic. Under this directory there is a folder with something "system11.....". Now to change weblogic related settings, open "defaultDomain/config.xml" and change it accordingly.