Nested dataloop based on XML response?

Hi,

I execute a WS method that returns XML data that contains an array of arrays and I need to be able to loop through both the data arrays to get at ID's within the inner-loop and make subsequent WS calls using that data.

I've got the outer loop working using a datasource set to XML and the response. What I can't seem to get working is a second datasource loop working with it's XML source being set to something from that first data source loop!

I've tried setting a property on that first datasource to select the sub-array, but that does not appear to work!:(

Any help would be greatly appreciated.

Thansk,

Andy.