Change XML Web Services Connection at Run Time

Hello, I am using an XML/Web Service Connection (HTTP(S) Data Source and HTTP(S) Schema URL) and need to change the location of the HTTP(S) Data Source at run time, for example from "/Integration.svc/GetDataView/463/en/3/50" to "/Integration.svc/GetDataView/463/en/3/62" (only the last number changes).

Could someone please let me know the method or property to set to change the URL string for the XML web service data source at runtime? Is it on the ReportDocument object?  I haven't been able to find a method or property to set anywhere.

Thanks in advance.