Lenovo X61 write ISO image to CDR

Hi all

I get the following error when my laptop is docked to the X6 and I have a CDR in the drive:

“Please, replace the disk with a supported CD or DVD.”

I want to burn an ISO image. When I first insert the CDR a pop-up asks if I want to start Brasero or Gnome CD/DVD something or other application. However, neither recognises any of the blank CDs are valid. They are Maxell XL-11 80s - Recordable.

Any ideas.

Regards

Neil