Text based on parameters

Hello, I am looking to display a value in a textbox based on parameters. How can I create an expression to do this?Here is what my code looks like:=IIf(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "phone" , "Phone List", "") ElseIIf(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "cell" , "Cell Phone List", "") ElseIIf(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "email" , "Email List", "")End IfEnd IfThanks in advance!