I have a problem with burning an ISO using PowerISO

Hello everyone, I’m trying to burn a game using PowerIso. I understand the basics of burning but this would be the first time I am doing this. I am burning a 640mb iso file onto either a dvd r or rw (I am having the same problem for both). In the burning drive section it says a complicated name that starts with [E:] which I’m pretty sure isnt the drive the disk is in and the dropdown menu doesn’t contain any other drives. When I try to burn the files it immediately says “media detect failed, or no media in the drive.”. Can someone please tell me whats going on and/or how to fix this?