Super Multi Blue ray disk rewriter GGW-H20L won't read blank disk

I resently got a Super Multi Blue ray disk rewriter GGW-H20L and it plays blue ray movies wonderfully, but will not reconize a BD-r Or BD-rw to burn too.when i go to my computer it dosent even show theres a balnk disk in when i put one in. anyone else had this problem or know how to help? thanks.

System info
4870 1gig for video
4gig ram
dule core 8500 3.10gh
750gig hd
VISTA!

You need software to burn the disc, as Windows Vista does not have native BR burning capability. Try Nero.