Noel96,
Latest.... I contacted my brother who has the same set-up as me and an identical computer. I asked him to mix down using DXi direct render and one wav file per track... the outcome is the same as me... only gets a single audio file of the entire mix.
I then installed Biab on to my laptop and did the same thing... it worked perfectly... all separate tracks. Apart from the obvious difference in desktop/laptop, my desktop uses Win7 Pro and laptop uses Win7 Home. I will be contacting PG Music and I will post up here when it is resolved; in the meantime thank you for your perserverance and help.
LFU2