Why isn't my disc drive reading that there is a disc in it?

When I put a blank disc in, it should come up and ask how I want it formatted, but it doesn’t. When I try to save something to the disc, it says there is no disc in the drive, and pops the try out with instructions to put a disc in the drive. I push the try, with the blank CD back in, but it still doesn’t recognize it.

Am I missing something really stupid here? Y’all know I spent weeks scanning and burning pictures to CDs recently….so what am I doing wrong this time?