Crystal Report Error Message

Question

Hi (Excuse me. My english is very bad.) I write a C#.Net program and add "Crystal Report" item to my project.(rpt File) then create "Setup" for it.(Setup.exe , Setup.msi , Setup.ini) When I install my program in another computer,when my program want to use (rpt file) a message appear in screen:"Can not find KeycodeV2.dll or invalid Keycode". Why? Please Guide me. Thanks.([email protected])