Hi
Whatever criteria you used in your query, use exactly the same expression in the report header. For example, if you used =[Enter Date] into the query, then in your report header, create an unbound text box and set the control source to =[Enter Date]. This usually works ok. If you find it asks for it twice, make sure it is identical but also look at the query parameters under the menu option Query - > Parameters when in the query design screen.
HTH, Andrew
