TextBox does not update when drop down list selection changes

I have drop down list the user can select a client name from. Once the client is selected and the "view report" button is clicked it the report has a textbox that displays the Client name or it is supposed too.

The report will display the first client name but any subsequent client name does not display on the first. I am pretty sure that is because I have chosen the "Dataset" where the both the "values' have "first" in front of the field.

How do I get the textbox to update to match as each client is chosen from the drop down list? I cannot use the report "parameter" I am passing to the stored procedure because the drop down list's parameter is the database name not the client name.

Any help is appreciated.

Thanks,

Sue