I got the error “Line 305 invalid”

I have been using the Retro software to backup the Windows XP computer to an external hard drive. Recovery from trojan attack made me to think making a recovery CD. So after the system recovery, I backup all the files and proceeded to make a CD. I have the recovery partition on the hard drive and also have installation CD. In the process of making the CD Retro prompted to insert the installation CD and redirected itself to the recovery partition.
But I got an error that the file would be too big to fit on a cd and asked to insert another CD. I got the same error on inserting the CD I received with the computer. Then I inserted another CD that I have purchased and that was accepted and the recovery CD was created successfully. But on trying to boot for the CD, I got the error "Line 305 invalid". Can anyone help me to complete the process successfully? What can be done?
