Channel Communication in Cognos Portal Pages

[Ann]

Hi All,

I have an Issue here.

I have a dashboard page created using Cognos Portal Page.

I have added two cognos Viewer inside the same.
First cognos viewer linked to a report with a prompt( parameter1).
Second just has a layout calculation to show the parametr diplay value for The parameter1.

I have given Channel Name as 'A'
Enabled Communicate with other portlets , using Channel (Channel Name A)
for both cognos Viewers

I try selecting different values from Prompt in Report 1(cognos Viewer1 )
But My Second cognos viewer does not refresh :( Any Clue