Column Specific Drill throughs from matrix columns

Actually I managed to solve this by simply rereading a previous post.  My issue was, I had set the drill through up passing the appropriate filter for the project and the detail page had inherited the current filters.  The instructions I read inthe post suggested adding the KPI tot he drill through fields and this simply didnt work however I then removed all of the other filters and added just the KPI to the drill through fields and it worked like a charm:)