nd bro there is CAS attached with application which is showing the date so due to one word or one integer how can they refused Visa is there is rule for that???

how can i inform them procedure???????????

Hi i hd enterd the wrong end date of my course in Application form which is 09/06/2011 nd correct date is 09/06/2013.
is it harmful for me.
there is
also CAS attcahement with my application. . .