help for Web service please.

I'm trying to learn web service using CFMX 6.1
This will be the first time I'm exposed to web service as far as doing some coding with CF.
I found a good tutorial at: http://www.adobe.com/devnet/coldfusion/articles/beginner_ws.html
I follow all the steps and it was successfull.
Then I'm trying to do the same thing but this time I'm passing a query instead of a string and I got error (see below).
I've checked the web service I created by viewing the wsdl file, it is functioning correctly (attached)

Here is the code:
simple_2.cfc:
<cfcomponent>
<cffunction name = "OurStocks" returnType = "query" output = "no" access = "remote">

<cfquery name="qGetStock" datasource="Enroll">
select StockName, StockDimensions FROM Ref_PrintStock
</cfquery>

<cfreturn #qGetStock#>
</cffunction>

</cfcomponent>

Here is how I call the web service:
CallSimple_2.cfm:

<cfinvoke webservice=" http://localhost/test/Intro/simple_2.cfc?wsdl"
method="OurStocks"
returnvariable="returnedQuery"></cfinvoke>

<cfdump var="#returnedQuery#">

Here is the error I got:
Web service operation "OurStocks" with parameters {} could not be found.

Here is my wsdl:
<?xml version="1.0" encoding="UTF-8" ?>
- <wsdl:definitions targetNamespace=" http://Intro.test" xmlns:impl=" http://Intro.test" xmlns:intf=" http://Intro.test" xmlns:apachesoap=" http://xml.apache.org/xml-soap" xmlns:wsdlsoap=" http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soapenc=" http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd=" http://www.w3.org/2001/XMLSchema" xmlns:tns1=" http://rpc.xml.coldfusion" xmlns:wsdl=" http://schemas.xmlsoap.org/wsdl/" xmlns=" http://schemas.xmlsoap.org/wsdl/">
- <wsdl:types>
- <schema xmlns=" http://www.w3.org/2001/XMLSchema" targetNamespace=" http://Intro.test">
<import namespace=" http://schemas.xmlsoap.org/soap/encoding/" />
- <complexType name="ArrayOf_xsd_string">
- <complexContent>
- <restriction base="soapenc:Array">
<attribute ref="soapenc:arrayType" wsdl:arrayType="xsd:string[]" />
</restriction>
</complexContent>
</complexType>
- <complexType name="ArrayOfArrayOf_xsd_anyType">
- <complexContent>
- <restriction base="soapenc:Array">
<attribute ref="soapenc:arrayType" wsdl:arrayType="xsd:anyType[][]" />
</restriction>
</complexContent>
</complexType>
</schema>
- <schema xmlns=" http://www.w3.org/2001/XMLSchema" targetNamespace=" http://rpc.xml.coldfusion">
<import namespace=" http://schemas.xmlsoap.org/soap/encoding/" />
- <complexType name="QueryBean">
- <sequence>
<element name="columnList" nillable="true" type="impl:ArrayOf_xsd_string" />
<element name="data" nillable="true" type="impl:ArrayOfArrayOf_xsd_anyType" />
</sequence>
</complexType>
- <complexType name="CFCInvocationException">
<sequence />
</complexType>
</schema>
</wsdl:types>
- <wsdl:message name="OurStocksResponse">
<wsdl:part name="OurStocksReturn" type="tns1:QueryBean" />
</wsdl:message>
<wsdl:message name="OurStocksRequest" />
- <wsdl:message name="CFCInvocationException">
<wsdl:part name="fault" type="tns1:CFCInvocationException" />
</wsdl:message>
- <wsdl:portType name="Simple_2">
- <wsdl:operation name="OurStocks">
<wsdl:input name="OurStocksRequest" message="impl:OurStocksRequest" />
<wsdl:output name="OurStocksResponse" message="impl:OurStocksResponse" />
<wsdl:fault name="CFCInvocationException" message="impl:CFCInvocationException" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:binding name="Simple_2.cfcSoapBinding" type="impl:Simple_2">
<wsdlsoap:binding style="rpc" transport=" http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="OurStocks">
<wsdlsoap:operation soapAction="" />
- <wsdl:input name="OurStocksRequest">
<wsdlsoap:body use="encoded" encodingStyle=" http://schemas.xmlsoap.org/soap/encoding/" namespace=" http://Intro.test" />
</wsdl:input>
- <wsdl:output name="OurStocksResponse">
<wsdlsoap:body use="encoded" encodingStyle=" http://schemas.xmlsoap.org/soap/encoding/" namespace=" http://Intro.test" />
</wsdl:output>
- <wsdl:fault name="CFCInvocationException">
<wsdlsoap:fault use="encoded" encodingStyle=" http://schemas.xmlsoap.org/soap/encoding/" namespace=" http://Intro.test" />
</wsdl:fault>
</wsdl:operation>
</wsdl:binding>
- <wsdl:service name="Simple_2Service">
- <wsdl:port name="Simple_2.cfc" binding="impl:Simple_2.cfcSoapBinding">
<wsdlsoap:address location=" http://localhost/test/Intro/Simple_2.cfc" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>