We have a bunch of old crystal reports that we created with Crystal Reports XI (release 2). The Crystal Reports Runtime engine is version 11. Now we are upgrading our servers from Windows Server 2008 to Windows Server 2012. We found out that those old reports would not run any more. We were told that Windows Server 2012 needs new version of Crystal Report runtime engine like version 13. We downloaded the new version of runtime and installed on our machines, but we still could not make those reports up running. My question is what is the proper way to make those reports run correctly on windows server 2012? Do we have to recompile those reports with newer version of Business Object as well? If so, what will be version that we need to buy?