Mario Galaxy 2 black screen after getting the 7 th star

[sqa]

I tryed twice and always the same problem. After I killed the huge warm with red balls on it, and getting the seventh star the black screen is comming as it should be but that's it. Although FPS, VPS and speed numbers are dancing. I am able to bring Home menue, but pressing Close the black screen comes back. I am using XBox gamepad. What can I do to fix it? and I have r6091.