XML Schema SOAP Request

Hey guys, this is my first time using SOAP. I need to send XML Schema request to my server, but I get Cannot find table 0. The guys who made the software are not telling me how to format my XML Schemas to send orders to my server. I'm making an app btw.

This is what I need to send:

<SendOrder xmlns="http://wMobSrv/wMobService"><dsOrder><xsd:schema>schema</xsd:schema>xml</dsOrder><dsArticles><xsd:schema>schema</xsd:schema>xml</dsArticles><dsResult><xsd:schema>schema</xsd:schema>xml</dsResult><Database>string</Database></SendOrder>

Can you tell me how to format

"<xsd:schema>schema</xsd:schema>xml"