I have some problems with Your latest WHDLoad version (15/08) on real Hardware... at The Start screen the fire button doesn't works and I have a screen error write in Red. With a previous version I didn't Had this problem... Could someone can confirml this problem. Under WinUAE I don't have the problem.
It did finally worked for user 'gmeista' here in the comments below (real hardware, A1200/TF1260) but then it stopped working for you... It was a long thread but I suggest the NOMMU tooltype trick which may play a role in making it work on real hardware (specially on MMU-equipped accelerator cards, it seems). Alternatively, you could get rid of those Preload ones (it helps on certain setups).