The simple program works better on the 12v supply .
The link you gave me makes reference to the fact that the sequence should be 8,10,9,11 so I changed the program to that and it has made a difference, it looks like it might be working now but the motor has such a large gear reduction ratio that it is hardy moving. I tried it with the program set to 2048 as suggested in the link but all I get is buzzing, maybe it can't handle them that quick. I am to my bed now but will take another look tomorrow.
Thanks for the replies.