Getting System.ArgumentException with DataSet and XML

[Akademos]

Hi,
I've got following XML-XSD:

xs:schema id="trace" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
  xs:element name="trace" msdata:IsDataSet="true">
    xs:complexType>
      xs:choice maxOccurs="unbounded">
        xs:element name="filter">
          xs:complexType>
            xs:sequence>
              xs:element name="dtsbegin" minOccurs="0" maxOccurs="unbounded">
                xs:complexType>
                  xs:attribute name="dts" type="xs:dateTime" />
                /xs:complexType>
              /xs:element>
              xs:element name="dtsend" minOccurs="0" maxOccurs="unbounded">
                xs:complexType>
                  xs:attribute name="dts" type="xs:dateTime" />
                /xs:complexType>
              /xs:element>
              xs:element name="stack" minOccurs="0" maxOccurs="unbounded">
                xs:complexType>
                  xs:attribute name="id" type="xs:string" />
                /xs:complexType>
              /xs:element>
            /xs:sequence>
          /xs:complexType>
        /xs:element>
        xs:element name="log">
          xs:complexType>
            xs:sequence>
              xs:element name="move" minOccurs="0" maxOccurs="unbounded">
                xs:complexType>
                  xs:attribute name="stack" type="xs:string" />
                  xs:attribute name="src" type="xs:string" />
                  xs:attribute name="dst" type="xs:string" />
                  xs:attribute name="srcpos" type="xs:string" />
                  xs:attribute name="dstpos" type="xs:string" />
                  xs:attribute name="dtsbegin" type="xs:dateTime" />
                  xs:attribute name="dtsend" type="xs:dateTime" />
                  xs:attribute name="srcdvc" type="xs:string" />
                  xs:attribute name="dstdvc" type="xs:string" />
                  xs:attribute name="carrier" type="xs:string" />
                /xs:complexType>
              /xs:element>
            /xs:sequence>
          /xs:complexType>
        /xs:element>
      /xs:choice>
    /xs:complexType>
  /xs:element>
/xs:schema>

Fitting XML-Data would look that way:

trace>
filter>
  dtsbegin dts="2003-10-04T12:00:00" /> 
  dtsend dts="2003-10-14T12:00:00" /> 
  stack id="" /> 
  /filter>
log>
  move stack="5236.3112.2359" src="71" dst="94" srcpos="17" dstpos="41" dtsbegin="2003-06-10T10:25:53" dtsend="2003-06-10T10:30:25" srcdvc="500000" dstdvc="500000" carrier="5504" /> 
  move stack="5236.3112.2359" src="31" dst="4" srcpos="10" dstpos="14" dtsbegin="2003-06-10T10:25:25" dtsend="2003-06-10T10:34:58" srcdvc="500000" dstdvc="500000" carrier="5501" /> 
/log>/trace>

I load these data with following lines of code into a DataSet:

XmlTextReader xr = new XmlTextReader( sb.ToString(), XmlNodeType.Document, null );
		 DataSet xmlSet = new DataSet();
		 xmlSet.ReadXmlSchema( "d:\\xsd\\moveresolve.xsd" );
		 
		 xmlSet.ReadXml( xr );
		 //xmlSet.WriteXmlSchema( ".\\moveresolve.xsd" );
		 return( xmlSet );

This works well, but when i my program is terminates I've got following exception:

An unhandled exception of type 'System.ArgumentException' occurred in system.data.dll

Additional information: Relation log_move does not belong to this DataSet.

Has anyone an idea what causes that exception and how to solve that problem?

Thanks in Advance

Akademos