Can not burn photos to disc

I can not burn my photos to a disc that I have used before or a new one for
that matter. I am trying to save photos so that this junk Vista will not
delet all of them. The messag I get after I open my photo file and click on
burn is: Please insert a writable disc into drive D..After I put in a new
disc (the same kind that I used before that worked) and now a new window
opens and I get this "windows can not write to the disc you inserted" I have
over 500 photos and I find them in different places when I try to clean the
up and send copys to the recycle bin It takes all my photos out. Now I have
lost photos that I can never get back.
I have a folder marked for my photos on my desk top then I open it then
seclect all then burn then nothing. My burner dose not even run to load for
this program now. What can I do? This worked before so what has changed and
how do I reset it to work again
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oldfloater