Do you need to change the reference at runtime or design time?

>Hello *.*
>
>I need to change my server (machine) but my reports make reference to my old server.
>
>How can I run my reports reading data from my new server?
>
>I need change any reports to refer to my new server ?
>
>I´m using VFP 7 Crystal 9 and SQL SERVER 2000
>
>Tanks in advance.