Error at the time of installation ( AsteriskNow)

Hi,

Today i downloaded AsteriskNOW 1.0.2 ISO image (AsteriskNOW-1.0.2.1-x86-disc1.iso) and then burn it into the CD drive using Nero.

Now i am trying to install it on MY PC. I am using USB CD Drive and when i boot from the CD drive it show first window , in which it ask to press enter for graphic mode after that it ask for keyboard type and Language then it gives a pop up message “What type of Media contains the Package to be installed with four option like Hard drive, CD drive, FTP etc”

When i select CD DRIVE it says “The rPath Linux CD was not found in any of your CD drives.Please insert the rPath Linux …”

Please help me and let me know if i am making some mistake at the time of installation.

Thanks & Regards,

Amit Saxena