Help with alcohol 120%?

Well basically when I go on the image burning wizard (to make a PSX to disc) after i sleect the playstation datatype and all that and then i click start this message shows up saying: device name:DVD-RW e.t.c and next to it , Device Status:Blank disc DVD-R , and on the top it says: Please insert a blank DVD/CD-R -recorder to continue , But it's already in! , please help me with this because this has been driving me crazy! , thankyou!