The firmware on my unit has AU in the main version number while what i have from Oppo does not.......is this the problem?
Yupp, there's three FW's, one for US, Europe and now Australia.
If you bought locally you'l need to use the AUS FW not the US or European FW.
Suggest you try the Australian Oppo website (International Dynamics) or the retailer you purchased from.
Also, if you post the FW details of what's currently installed people here might be able to tell if you that's current or not.