Autorefresh a parameter

I am creating a report that will have no user interaction.  It is for display only. 

I have two parameters to the report: date and shift.  Is there a way to have them updated automatically.  The Autorefresh feature does not update parameters. 

I have tried setting the default for the parameters with an expression that gets the current date and time along with the Autorefresh feature set.  I have pointed the default to datasets which return the current date and time to the parameters.  It seems nothing works. 

Anyone else have other ideas?

Thanks,

Fred Schmid