SSRS 2008 R2 - Today () function is not working

Hi ALL,

We are using SQL Server Reporting Services 2008 R2 to build a report. We are trying to bring the system date in default values for Date parameter.

We have Date/Time type parameter which prompts the user for Date value. Now we are trying to set some default values like yesterday's date (Today() - 1)

So we are trying to implement this by the following formula,

=DateAdd("YYYY", -2, Today())

This formula is working fine in 2008 version of ssrs but not in 2008 R2.

In R2 version, if we use this formula  the date parameter that is visible in the report is getting disabled.

Please give us suggestion regarding this issue.

Thanks in Advance

DineshKumar