Error - Build.xml does not exist

Hello,


I have been trying to configure ant in my windows7 System. As explained in your videos,
Downloaded ant zip files, configured Environment Variables and copied build.xml file from you Selenium Pack which i have downloaded from your site. when I try running the command ant through command prompt, its throwing an error - Build Failed
Build.xml does not exist. Please note that I have given the right path in build.xml of my jar files where it presents.

Please suggest..

Thanks & Regards,
Leela