Hi All, first I just would like to say thanks... this forum is awesome, I often found a solution or some quality advice by browsing it, but now it's time for me to ask a question. I've got a Hp computer with a dvd burner: HL-DT-ST DVDRRW GSA-H20L. It has been upgraded with the latest firmware. However it will not recognise my Mitsubishi DL Dvd+R. Let me explain: I can burn any DVD no problem but when I put a Mitsu DL, the disc spin then nothing ... Media is empty !!! Would anyone know why ?