Installing a particular file in the GAC?

when I wanna to run a click once deployed vb.net win-application on my machine it says:

"Unable to install or run the application. The application requires that assembly CrystalDecisions.CrystalReports.Engine Version 10.2.3600.0 be installed in the Global Assembly Cache(GAC) first."

I have instal开发者_开发问答led crystal Reports 8.5 before and recently Crystal reports 10

So, what's wrong?

Check your GAC for the presence of this file, and check the version of the file (if it is present).

GAC can be found by....

The newer interface, the Assembly Cache Viewer, is integrated into Windows Explorer. Simply browsing %windir%\assembly\ (for example, C:\WINDOWS\assembly)

If you need to add this, this MSDN article is good guide

Hope this helps.