ReportParameter dependency problem

Hi,

I have a bunch of code for integrating reporting services 2000 with our application, which has been running fine for quite a while. We've recently encountered a problem and i can't quite figure it out.

There is a set of code that creates controls for entering parameter values for our reports, which takes an array of ReportParameters as an argument. We loop through the parameters and create controls as appropriate. The check to see if we need to create a dropdownlist of parameters populated through a query looks a bit like this:

if (oParam.ValidValues != null)
{
//Create ddl based on the list of valid values.

}

This is where i am encountering a problem. One of our reports, that has been running fine until recently is now not getting a dropdownlist created for it's second parameter. When i run into the code, i can see that this parameter now thinks that it has a dependency on the first parameter (which it does not), and the list of ValidValues is null.

If i go into the report designer and change the order of the two parameters in the report, then it works fine, the list is populated and there seems to be no dependency. If i change it back, it is broken again. I've checked the query that populates the list, it is not parameterised and is a very simple kind of SELECT A, B FROM TABLEA. I've looked in the report parameters and i can see nothing there either.

Your help would be very much appreciated here. I am running SSRS with SP2 applied.

Paddy

Ok, fault is down to me (which is a good thing, cause at least i can start somewhere). We have been trying to alter the RDL file as it is uploaded into our application (and before it gets uploaded to reporting services). The idea being that we would input a parameter on every query that would reference the Globals!ReportName variable.

The particular problem seems to be coming when i have to create a whole QueryParameters nodelist, as the dataset in question is not parameterised.

This seems to be causing the problem where one dataset seems to depend on the other. I've compared the xml within the altered RDL with what would be there otherwise, and i can't see where the problem comes in. Has anybody else ever tried to do this and have any advice?