chart disappear in crystal report

I have wrote a program which involved the crystal report class
and it is work fine in my computer but after i install my program in another computer which having the .net framework installed, i found out that the chart in my report has disappear.. do someone know what happen?

have you included all of the crystal report dll you need in your project for your deployed app on the other computer?

I have include the manage merge module which contain all the crystal report dll inside into my installation package... but still not working..