SQL Report Services - help with a Running Total

[JBourne77]

My company is in the transition of changing from Crystal reports over to SQL Reporting Services and needless to say, its hectic on me.

In Crystal you can create Running Totals. I have one set up as follows:

Field to Summarize: PatientID
Type of Summary: Distinct Count
Evaluate on Use of Formula: ObsValue = "1"
Reset on Change of Group: Race/Ethnicity

I found this link, but I am at a loss at how I set my Running Value up correct.

http://msdn.microsoft.com/en-us/library/ms159136(SQL.90).aspx