Problem occurs while starting the Zune program

Hello,
I have downloaded the setup from internet, but when I try to start the Zune program, it shows "Microsoft Zune has encountered a problem and needs to close."
Then I tried to reinstall it, but same problem persists and moreover, I tried UNzoone 2.
What should I do now? Do I require to setup something else because I took notice of something in a website. I am using WINDOWS XP Service Pack 2 Home Edition.
Please help.
Thanks.
