Need help in using Norton Ghost.

Hello!
I have an issue to discuss with you guys , hope i will get a good solution. I have made backup of my data using Norton Ghost's exe file , which can be located from windows crystal hiren cd option.
As you know it works only during boot process. I have to backup my data while running my operating system , for this purpose i have downloaded norton ghost setup , and install it.
The following screen appears when i tried to do something , if any knows why this appeared
and how to overcome this error , i would be thankful to him.

Norton Ghost
Status Details
No recovery points exists for (C:)
Thanks.
