JMS-Atmosphere won't update automatically

Dear All.
We use Vaadin to receive a JMS topic updates from another server. IF we have one user session to one JMS connection the data gets updated automatically on every browser. But we cannot verify each browser in vaadin log, each 1 log update covers all browser connections. IF we use singleton to limit the JMS connection to 1 (which also cuts unnesscessary traffic), the data gets sent to every browser BUT WITHOUT automatic updates. We have to click a mouse on a page for it to appear. Does anyone have any idea why this is and how to fix it?

Thank you