We have just brought a new system with sony dvd burner DVD RW DW-U18A. We are having heaps of trouble burning dvds. They will burn all right until the last 30 mins or so. We have tried nero, clone dvd and dvd shrink, all with the same problem. Could it be the actual discs that we are using or the fact that our burner is a single layer? Yet we can burn music cds alright and have had friends try and help us but nothing that we have tried has work. Any suggestion as to why it wont work or what program we could try?