If this issue persists with the latest version as well, then you need to uninstall IMGBurn and uninstall the drivers for the CD/DVD-ROM as well. To do this, go to Device Manager using Start > Run > devmgmt.msc. Locate the device and right click it selecting Uninstall Driver. After this process, change the cable of the device to another port and start the PC again. Let Windows install the drivers and then re-install IMGBurn, but go to Options first and use Restore Defaults.
Download IMGBurn: http://www.imgburn.com/