filter issue in workspace

[m.sahar]

Hi
I am new to cognos and I have a problem with report studio, I have to create a dashboard based on some unrelated cubes ,in order to make this dashboard I have to create some reports(individually) and collect them in a workspace, the issue is that I want to apply some filters(such as date) on all charts, but it just affects on the charts which have this column(filter such as year) as theirs axis, so could anybody help me out of this?
many thanks