Confluence-EZBI Plugin Timeout: There was error when performing your request. Please retry or go to other page

I attached a bunch of EZBI reports/dashboards to a confluence page using the Macro. But I’m getting error message for those relatively complex reports. Based on some of the readings, I assume this is a configuration problem that the gadget will timeout after 5 seconds.
But I am not sure where should I change this default configuration? On eazyBI? On confluence?