thanks guys it's now sorted, the unplug and replug method did it in the end, the probplem was, i assumed:
Device 0 was card 1 - GPU1 GPU2
Device 1 was card 2 - GPU3 GPU4
turns out its more like this:
Card 1 | Card 2
Device 0 - GPU1 & GPU3
Device 1 - GPU2 & GPU4
so before the unplug method wouldn't work because i was starting the wrong devices.
thanks again every1 who helped