Oops....I understand that at this stage is very hard to convince VO but at the same time your reasons look unconvincing because is easier to forget answering other questions in the form than previous refusals. Technically it just doesn't sound right, is always intentional because when get to this very question while filling your form, something always trigger your consciousness, I gues it happens to everyone one.
Rewrite your letter to show more emotions and sincerity
Good luck
I would try again today.