Refresh VS 2010 rdlc files (report viewer)

Question

Hi , Im trying to find how refresh the rdlc file in 2010. I change the name of field to a different value or name that the rdlc file is using. When I go back to the rdlc file to see the name that I just change in the dataset, the value does not update or change corresponding to the value i changed in the dataset. In 2008 its simple, all you would have to do is change or add a new field and hit save the , the rdlc will update automatically.
can someone assist me