Thanks Hufty
Just as you advised, I sent the email through the US Embassy web site and got a reply within 20 minutes.
I already have a B1/B2 Visa and this is valid with a letter from the FTO stating that you will be doing NO flight training and max TOW of aircraft to be flown.
Thanks everyone for your very helpfull replies and i will keep you all informed if I still struggle to get in to America.