Missing Paramter Values !!!!

Hi Guys,

First time i am working on Crystal Report. Actually I am trying to access the Crystal Report parameters from my application and I am getting the above error.

My Crystal Report structure is like this -

Main Report Parameter - ClientVersionID

Have Multiple Sub Reports. One is having ClientVersionID as Parameter and another having VersionID as Parameter. Both are Linked Parameters.

So while accessing the Report, i am passing a single paramter value to the Main Report i.e, ClientVersionID and i am not passing anything for Sub Reports. 

Can you guys please help me out in this..