That's Correct..but still you can use IIF to solve problem
=IIF(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "ext" , "Phone List",
IIF(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "cell" , "Cell Phone List",
IIF(Parameters!getSource.Value = "emp" and Parameters!ContactType.Value = "email" , "Cell Email List"
)))
Thanks,
Dhana.!