XFBR for Column Sharing

Hello,

I am using a cube view that has the same rows, but it needs different columns based on the UD8 member.

I built multiple template columns cube views, and created a parameter for UD8 members. I want to retrieve the column template CV based on the selection of UD8.

I created the following XFBR:

I then attached it to the main Cube View:

When I run it, and select UD8, nothing appears:

If I put directly the template name, the cube view runs with no issues, showing data as well.

Any idea why it is not working?

Thanks,

Ioana