Dynamically Set Data Source Location

I have an ASP application where user selects a site code from a drop down list. Each site code points to a different server. Now when I run my Crystal Report using the report viewer I would like to set the server name dynamically:

Example:

Site code RGWP equals
Remote Server \\10.xxx.0.254:211
Database: C:\Program Files\Astec Industries\WM2000\Data\WM2000DATA.add (data source location)

Site code RGDF equals
Remote Server \\10.yyy.0.254:211
Database: C:\Program Files\Astec Industries\WM2000\Data\WM2000DATA.add (data source location)


This is the code I have:

Code:

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myCrystalReport1.SetDataSource("C:\Program Files\Astec Industries\WM2000\Data\WM2000DATA.add")
myCrystalReport1.SetParameterValue("BatchGuid", BatchGuid)
myCrystalReport1.SetDatabaseLogon(System.Configuration.ConfigurationManager.AppSettings("CrystalReport_UserId"), System.Configuration.ConfigurationManager.AppSettings("CrystalReport_Password"))
CrystalReportViewer1.ReportSource = myCrystalReport1
CrystalReportViewer1.Zoom(90)

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I don't know how and where to set the server name.