Adding a Line to a Stacked Bar Chart in SSRS 2008

I was wondering if anyone ran into this problem - I have a standard stacked bars that displays percentage of sales for 3 categories. It works fine. I want to add a second Y axis that will have numbers, not percentage and add another serie to that axis. because data is different the report is not displayed correct - basically I want the series to overlap; right now the series with number is at top and the percentage is at the bottom.

Here is what I mean - this is the desired output

And this is what I have

Thank you for your help!

Adrian