Dataflow task with MultiCast transformation giving "Connection failure" error while using stored procedure

Hi,

I have a stored procedure which pulls around 30 million records from multiple tables. My SSIS dataflow task's design is as given below.

When I try to call this stored procedure in oledbsource, SSIS is throwing connection failure error. But if I give the same query inline in oledbsource there is no error and it is working perfectly. I started getting this error after introducing Multicast and Derived column. With one source and one target SSIS works fine with the same stored procedure. 

Appreciate your valuable help.

Thanks,

Prasad M