error while exporting/print crystal report

well i built a web application it works, now when i passed it to the server... it didn't run, i passed .ddl to the another computer (where visual studio c# is installed too) and it ran. in my computer where i programmed it, it could print, or export to pdf, word, excel, rpt etc.. now when in the server, images of crystal report dont load they appears as a (X) everyone! the image for print, for export.. tree view .. well all appears a X then... when i press on print or export, i got next error:

Server Error in '/' Application.
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HTTP Error 404 - Not Found. 

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Version Information: ASP.NET Development Server 9.0.0.0 

I had read when i had another error when i was programming error is not of crystal report else it can be of adobe, whell i need a solution for that error...

You need to install the Crystal runtime engine for 2008.