InfoPath Dev

I Use infoPath 2007.

Myprimary datasource is a webservice. I want to add an secondary datasource of the type XSD.

I can use this XDS without any trouble when I create a new InfoPath form and select XML datasource.

But I can't get it in InfoPath like a secondary datasource, When I select XML inbound it gives an error.

You cannot create a secondary data source from an XSD - instead, create an XML compatible with the XSD and InfoPath will automatically infer the XSD from it.