Hidden parameter using userid

I have created a hidden parameter with a default value of user!userid so I can pass this to a UDF which returns a table with data dependent on the logged on windows user. This works fine until I view the report using Report Manager when any alteration to any of the other parameters requires me to click twice on the View Report button before the report is displayed. The problem does not occur if I have a hidden parameter which either has a default value obtained from a query or is a constant. Any ideas on how I can overcome this? Thanks.I have since discovered the problem is not as stated but is due to the fact that I have hidden parameters dependent on the input of an earlier parameter. If the input parameter is a drop down then all is OK but if you have to interactively enter a value then you have to click the View Report button twice. Removing the userid parameter meant that the dependent parameter was last in the list and again all was then OK; however, I still have some reports where I have more than one hidden parameter dependent on an earlier value so the problem still occurs.
"JohnH" wrote:
> I have created a hidden parameter with a default value of user!userid so I can pass this to a UDF which returns a table with data dependent on the logged on windows user. This works fine until I view the report using Report Manager when any alteration to any of the other parameters requires me to click twice on the View Report button before the report is displayed. The problem does not occur if I have a hidden parameter which either has a default value obtained from a query or is a constant. Any ideas on how I can overcome this? Thanks.