how to release fields filled up automatically in query selection criteria

Hi

One of the user is accessing a Report on "Balance Sheet " and is executed automatically without any selection with the following parameters:

"Compcode: X",

"Pcenter: Y",

"posting: 0 to 9",

"year: 2008".

´I would like to release the corresponding fields.

I have tried selecting fresh query from workbook as sometimes it picks up the saved version from history. but its the same.

Also I have checked that there are no default variables in the variables.

Anyone have any suggestions how to remove those parameters.

Thanks