crystal report graph did not appearing in production server

Question

i have a report using crystal report. i have run it in development server and it works fine. When i deploy it to production server, the report does not have error but graphs and table did not appear. i'm using crsytal report 2012 ver 13.0.5, visual studio 2012. i have add

 

<add path="CrystalImageHandler.aspx" verb="GET" type="CrystalDecisions.Web.CrystalImageHandler, CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304" />

to my web.config, but still the graphs did not appear..please help anyone.. Thanks