I recently purchased a DP-24 I was having some problems so I called Tascam and he told me I needed to update the firmware which I did and purchased one of their approved disks. After carefully reading manual everything seemed to be going smoothly, I have 9 songs as master files and was ready to burn disk. I tried both the disc at once and the one song at a time and both seem to go right along with the manuals writing and pictures until I get to ready to burn disk and I say yes and it seems to start to work but then comes back with an error message Writing Failed ANY IDEAS?