I developed a GUI application and for 2 days it was functioning perfectly but today when i executed the jar file Window showed me message that the java application has changed the color scheme of windows . I dont have a single clue that why is this happening

Additional Info : My application is just using JWindow and adding slider effect in it
First i was using JDK 1.7 but due to this i switched to JDK 1.6 but the problem is the same
In this application i am connecting to gmail and retrieving mails from it

Plz help i am clueless