drill down reports via rdlc files

I have the drill through working to a certain extinct, I can drill down through each rdlc via hyperlink, When I get to the last report , on the reportview it has a option to go back to the parent report, when I click that button, I get a error that saids some parameters or credential values are missing, anyone familiar with this error, how can you tell parametes are missing, when I step through I seem to have all the parameters I need

Good. It is frustrating trying to get critical information from someone that acts as if I am trying to pull a tooth. It happens many times in forums, not just you by far.

Nevermind you guys i found out how to do it, I forgot if you go to the report viewer it self , and double click it automatic generate the method itself, Now all I have to do is create my logic for my hyperlinks to work which is the easy part,

As best as I understand reports, there are multiple ways to create drill-downs. The first step is to decide which way is appropriate for your application.