Cannot copy to DVD

I tried to copy a DVD but it will not recognize a DVD(BLANK).
I tried 4 of them. I use to use this program then stop . I just started back up recently and got a new KEY. Everything seems to work fine except the copy part......ANY IDEAS? HELP!

thanks,

 

Please read and follow http://forum.slysoft.com/showthread.php?t=476 fully (especially step 1 and 2)
Print it out if you have to.