Blindwrite5 and dvd

why can i not write a dvd with this program.
It reads and make an image. It will not burn.
says can not write this media. I used DVD-RW and DVD-r.
strange.
I tryed both data dvd and dvd-movie image

used the latest blindwrite version 5.o.1.112
have nd1300a burner
DVD-RW imation and Verbatim
DVD-R was sunstar and Ritek and Prodye(princo)