Xml Datasource - how to refresh?

I created a Crystal Report on an XML created from another program. I was able to create the connection and put the field on the report. I updated the XML string with new data, reopened the report and it displays the data from the previous xml report. I saved the report so it doesn't have the data with it. I tried logging out of the server option and reconnecting to it.

I need to set this up so a user can run the other program, export out the data as XML, then open the report for viewing and printing. The user will be saving the xml under the same name each time in the same folder, basically overwriting the xml file each time.

I'm using Crystal Report XI fully updated.

Thank you.

Christy