Scheduleview change view definitions time format programmatically

Hi,

 I want to change RadScheduleView 's ViewDefinitions TimerulerMajorTickStringFormat to current thread culture time format string. i tried setting this in code behind and by using convertor, in both approach it gives exception "Input String is not in a correct format", but i used hard coded which works in xaml file.

  in xaml,

below code snippet tried end of the view's constructor (after initializing component) and even before that, no luck

Could you please help me.