- first download and install the runtime like CRVS2010CR3220_0-10010309
- create c:\temp folder
- give read / write permission to c:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\
- enable 32 bit application in iis application pool
- copy crystal report assembly files from c:\Windows\assembly\GAC_MSIL\ to application bin folder
- remove crystal report version number from web.config and .aspx where crystal report viewer control is used to avoid version conflict
