Teradata SQL Assistant with .net data provider error on start up

I recently format my computer and install TTU 13.1, but when I start up the Teradata SQL Assitant, it causes the error below:
 
"The . Net Data Provider for Teradata 13.01 or above was not found.
If you have installed a version of Teradata .Net higher than 13.01 then you did not install the optional Policy Files. In this case you can use Add or Remove Programs to modify the install of the .Net Provider for Teradata.
You will only be able to connect to Teradata throught ODBC."
 
I already installed newest versions but always happens the same error and reinstalled the .Net Data Provider and SQL Assitant.
What can I do?