I burned a CDRW disc as ISO 9660 with a boot image using Easy CD Creator 3.01, I included some other files on it. After using it on a different computer I needed to format it and rewrite something on it. Using Easy CD Creator 3.01 I tried formating it but it would not allow me to, I downloaded a program to find out what was wrong with the disc and it told me it was a CDR disc not a CDRW disc. But i know it is a CDRW disc.

What did I do wrong and can i fix it?

Thanks for the help.