Sometimes the Refresh button in various pages does not function when you click it.
Work around:
Log out from iManager.
Clear the browser’s cache.
For Internet Explorer,
Click Tools > Internet Options. The Internet Options dialog box is displayed.
Under the General tab, under Browsing history, click Delete.
For Firefox,
Click Tools > Clear Private Data.... The Clear Private Data dialog box is displayed.
Select Cache and click Clear Private Data Now.
Log in to iManager.