ParamDisplayValue() doesn't show runtime value for scheduled report

[gemu]

Hi,

I want to show the values that were used to run a certain report so on the Page header of this report I have a Report Expression that says "ParamDisplayValue('prmptValue')" to show the date prompt. It all works fine when you run a report manually but when you schedule a report, for example from today-3 untill today, it keeps giving me the values that were applicable when I created the schedule although it is actually using the correct rolling values. In other words, the date shown by ParamDisplayValue('prmptValue') stays the same when the week progresses although the actual values used at runtime are correct and changes as the week progresses.

I also tried ParamValue('prmptValue') but the result is the same. Does anybody know what is causing this or with what expression I can retrieve the actual values that Report Studio is using to run the report? Any advice would be much appreciated.