Sorted it. Downloaded the latest version of NI-488.2 and that removed all functionality, but after working with NI support in Belgium, its fixed. The address you set to the GPIBInit.vi, was I assumed the same to that of GPIBWrite.vi, however, they needed to be set differently (CAD:PAD) and (CAD+PAD) respectively. I understand the logic of the first, but CAD+PAD ???
anyway, its working..