Failed to download chart or image in SharePoint 2010 excel services

Hi,

I have one document library in SharePoint 2010. I have uploaded one excel sheet which is having chart. Now when I am trying to open it in browser, but it is showing me below error on chart part of excel sheet.

'Failed to download chart or Image'

This is happening on prod server. I tried similar process on lower environment in SharePoint 2010. It is absolutely working fine. I checked all services, settings on both farm but doesn't find any clue.

Please help.