The Value expression used in textbox ‘textbox21’ returned a data type that is not valid.

Hi,

In my report iam passing parameters Like Fype, Dnit, Crea..

And i want to display these parameters in the place of Fields..

In the filed textbox iam selecting this parameters like "=Parameters!FYPE.Label"

=Parameters!Dnit.Label, =Parameters!Crea.Label..

Iam getting the below error..

How can solve this...Thanks