DVD writer won't recognize medium

I have a new HP laptop with dvd writer. When I put a verbatim dvd-r into it it says insert recordable medium. The combo drive is a toshiba ODD-DVD SD-R6252. Any idea what is wrong, or if I am doing something wrong.

Most newer HP notebooks with DVD burners onboard will (IIRC) only record onto DVD+RW burn once and rewritable blanks, not DVD-R. Have you checked your DVD drive specs for compatibility?

No, I did not. I will look that up. Thanks.

Evidently that drive is known to have problems. Here is what an Admin at hplaptopforums.com has to say about it.