Datagridview scrollbar

Hi,

i have datagridview which is inherited from  customgridview   ,the datagridview's datasource have many cloumns

but i need to display only three columns, intially all columns will be hidden depending upon my selection of other controls

datagridview should display  these 3 columns --------now this is happening but  scorllbars property is given as Both(vertical and horizontal)  for datagridview which is not  showing scrollbars why ?

Any answers then please reply asap waiting for----------thankyou.