How to: Push method on main and pull on subreports using .net?

[olitvinov]

I have a report that has subreports.
I'm trying to use a push method for main report.
For subreports I want to be pulled.
My code either gives me connection error or there would be no data in subreports. Any way I put it the output is incorrect.
How do I code it correct way?
The samples available is only for all tables 'push' or
all tables 'pull'.

Here's what code does now:
1. main report is set with SetDataSource(ds) method.
2. for each subreport I provide ConnectionInfo.
the result is connection error.
If I reverse 1 and 2 the result is empty subreports.

Thanks,
Oleg