Crystal Reports And Deployment

I developed a database application on VB.net 2005 and used Crystal Reports for printing receipts and query results. I packaged and installed successfully on the target machine. Whenever user wants to print or run reports, it says:

Could not load file or assembly 'CrystalDecisions.CrystalReports.Engine,Version=10.2.3600.0,Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.

I suspect it is because the necessary files of Crystal Reports have not been included in the package for setup. I used Inno setup (thanks BTW to Kleinma who did a great job in posting a great and informative Inno script sample on this forum).

How do I go about including the necessary files into the setup using Inno? Or is the problem elsewhere? Thanks a lot