Cross-Navigation with BIRT

Hi All,

I can successfully cross navigate between two reports using the following: "javascript:parent.parent.execCrossNavigation(this.name,'BranchMatters','pBranch=Kendal');"

However, I want to use the following for the parameter based on where the user clicks in the Bar Chart: Variables/Chart Data Point/categoryData. But when i set my cross navigation to "javascript:parent.parent.execCrossNavigation(this.name,'BranchMatters','pBranch=categoryData');" nothing happens.

Any help will be much appreciated.

Martin