This issue is due to JRE.
Please install jre-7u21 and uninstall all other avaliable versions.
If you want multiple versions to be avalaible, Goto....Control Panel >Programs > Java (Double click)....select view tab and unselect other versions of java.
And after that try to login to P6 and check.
Oh! Nice! Thanks!
Just one question: I'm make this changes in my computer or in the server?
In your local system.
Thank you!!! Work fine here!