Web Service

hi,

i am trying to learn how to do a web service.

I used this example to figure this out
http://www.quackit.com/coldfusion/tutorial/coldfusion_web_services.cfm

my code is here
http://www.climatetech.net/cti_webservice/Test_WebService.cfm

Code
===============================================

<cfinvoke
method="listBooks"
returnvariable="rawXMLFileList"
webservice=" http://www.climatetech.net/WebService.cfc?wsdl">

<cfinvokeargument name="category" value="123">
</cfinvoke>

<cfset FilesXML = XmlParse(rawXMLFileList)>

<cfdump var="#FilesXML#">

========================================
and my cfc file is here
http://www.climatetech.net/cti_webservice/WebService.cfc

code



<cfcomponent>
<cffunction name="listBooks"
access="remote"
returntype="string"
output="no">

<cfargument name="category"
type="string"
required="yes">

<cfset Var FileList = "">
<cfset Var getBooks = "">
<cfquery name="getBooks" datasource="DS" maxrows=100 dbtype="ODBC">
SELECT FileToolID,FileTitle, FileDescription, File3
FROM FileTool
Where FileTool.StatusID = 'Approved'
AND FileTool.FileCONFIGID = 24
</cfquery>
<cfsavecontent variable="FileList">
<Files>
<cfoutput query="getBooks">
<File id="#FileToolID#">
<Filetitle>#XMLFormat(FileTitle)#</Filetitle>
<FileLink> http://www.resourcesaver.org/file/toolmanager/#XMLFormat(File3)#</FileLink>
<Description>#XMLFormat(FileDescription)#</Description>
</File>
</cfoutput>
</Files>
</cfsavecontent>

<cfreturn FileList>
</cffunction>
</cfcomponent>


=========================================================

this is really basic but for some reason i can not get this to work. has any one set one of these up and made it work before. i have never done this before but i figure get a basic example working first to understand this.