You cannot burn an image onto the flash drive. Burning an image literally relates to the use of lasers in he disk drive to burn information onto an optical disk.
If you are trying to install a program on the flash drive is not being detected chances are you will not be able to. This happens for various reasons related to the manufacturer, the age of the device, and the product itself. If this is the problem, there is no way you to get around it. You will need another flash drive.