Troubleshoot

1.Images/Graphs Not appearing in Reports

On the server the image is created in a temp folder E.G.

 C:\Windows\Temp\cr_tmp_image__CRM71_CustomPages_CRViewer_server_serverport

But deleted immediately once it has been downloaded.

You need to check permissions on this folder

If you continue to have issues check the IIS log file. The location of the IIS log files can be located in IIS.