Bank account figure in Nomial account is not showing correct balance

Hi

doing the end of year accounts with the accountant and we have an issue

in nominal accounts we have set the range to 01/09/2014 to 31/08/2015 and the bank balance shown at 1200 is only 4,526.65 it should show 42,692.65

if i set the date hower to 01/01/1900 then i get the right figures

i have processed the year end but still not made difference. i can work out whats going wrong.

Update: i have since worked out if i adjust the date to a date before 28/08/2014 i get the correct balance if i set it for any date between 28-31/08/2015 then i get the wrong amounts