Dear Edmund.
Thank you kindly for your reply. Out of some strange reason I did get it to work in the end after resetting the Oneforall and starting from scratch learning every key individually instead of using the codes. This time the ok button also worked and all is well.
I can now finally fully controll my TV. As I use the steaming box features of the ofa remote to control my TV, as I don't use a streaming box. And have programmed the volume key and power button to controll my audio system.
Everything works extremely well.

Thank you so much for the help.