Nice image, great demonstration of motion, good luck!

You can't use the background image, it is already manipulated. Have a look at these two links:
http://www.pxleyes.com/guidelines/
and
http://www.pxleyes.com/blog/2009/06/how-and-where-to-find-legal-source-images/
That should help you

Try a different background

in the sxc.hu i read the image license... i can use the image!! read: You may use the Image * In digital format on websites, multimedia presentations, broadcast film and video, cell phones. * In printed promotional materials, magazines, newspapers, books, brochures, flyers, CD/DVD covers, etc. * Along with your corporate identity on business cards, letterhead, etc. * To decorate your home, your office or any public place.

It doesn't matter, what sxc says in this case, it does matter, what the PXL-guidelines say! And there you can read clearly, that you are not allowed, to use premanipulated images.

author, Lelaina and CMYK46 are right. Yes you can use that image places, but since it is a picture that has been manipulated already, you can't use it here. Check out the links that Lelaina gave. I know it is confusing, but they are right.

Wont talk about the background

hmmmm ok, now i understand... im learning... sorry.. i will remove the image... doesnt matter....

how i proceed in this case?

image updated!

the motion blur is a little odd but this is cute!