your profile isn't the same as your homepage. you're profile has a white background because you haven't added a layout to your profile. to do this, go to layout sites for myspace [ you can google myspaces layouts] such as hot-lyts.com and look for one you like from there. then there will be a code for you to copy, after you copy this code go back to your myspace and click on edit profile. paste the code in your about me section and click save all changes. you're layout should be on your profile now.
hope this helps