Crystal Report Version Problem and Warning

I am using VS2008 and once I open crystal report from another web application, it gives me warning:  

"This report was created with a version of Crystal Reports which is later than the version you are running. Some features used in the report may not be supported"  

I have opened the web.config file and found the crystal report version is : 10.5.3700.0  

My IDE is VS 2008 and once I open any crystal report, it this the warning about the lower version of crystal report.  

How can I solve this problem? What I have to do?  

Please help.

Thanks in advance.