You may have installed too many feeds/widgets in your dashboard(s)
For optimum use, you should ideally not exceed 300 feeds/widgets on free-tier private dashboards.
Follow the normal process to log in your Netvibes account from the Netvibes startpage
Click on “Create” or “Dashboard wizard” to create a new private dashboard
Click on “Rearrange tabs” and finally dispatch some tabs to the newly created dashboard
Trick to optimize the download speed of your page
Go to “Settings”
Check the option “Only load modules for current tab”