Error when trying to use more than one rc file in an MFC project

[Guest_imported]

I´ve been trying to work with two .rc files in the same MFC project. Though
I´m doing just what MSDN tells to do, an error occurs.
First of all, I changed the resource symbols in the "resource.h" file, and
also changed the _APS_NEXT values to avoid assigning the same IDs to two
or more controls. Then I added a second .rc file in the project by #including
it in the main .rc file, and rebuilt all.
A fatal error occurs, saying that there's being a "resource redefinition".
Can anyone, please, help me?

Thanks