How to create/call dynamic XML feed from CFC - HELP PLEASE!!

Question

Hi All,
First off I'm a newb to web services.  I'm trying to create the invoke a web service on a CFC for a XML feed.  When I call the CFC directly all looks fine and is correctly formatted etc:
http://www.prevu.tv/cfc/xyzTest.cfc?method=listPlant
Am I correct in outputting it in this way?  What if I output as a string instead......would others be able to consume it?
When I try to invoke it as a web service I am getting an error I do not understand.  I am trying to call it using (user/pass not required in CFC):
<cfinvoke webservice="test" method="listPlant" returnvariable="foo">
<cfinvokeargument name="username" value="abc">
<cfinvokeargument name="password" value="123">
</cfinvoke>
<cfoutput><cfdump var="#foo#"></cfoutput>
Here is my CFC code:
<cfcomponent>
    <cffunction name="listPlant" access="remote" returntype="xml" output="no">
    <cfargument name="username" type="string" required="no">
    <cfargument name="password" type="string" required="no">
        <cfquery datasource="#request.dsn#" name="getPlant">
        SELECT                *
        FROM                  plant
        INNER JOIN        plantaddress ON plant.plantID = plantaddress.plantID
        WHERE              icePlantID IS NULL
        AND                   categoryID NOT IN (9,10,11)
        AND                   statusID = 1
        AND                   activePlantList = 1
        ORDER BY        plant.plantID LIMIT 5
        </cfquery>
        <!---Convert Query to xml--->
        <cfprocessingdirective suppresswhitespace="Yes">
        <cfcontent type="text/xml; charset=utf-8">
        <cfxml variable="xmlobject">
        <PrevuPlant>
            <cfoutput query="getPlant">
            <Plant>
                <PlantID>#plantID#</PlantID>
                <PlantName>#XmlFormat(plantName)#</PlantName>
                <Street>#XmlFormat(street)#</Street>
                <Suburb>#XmlFormat(suburb)#</Suburb>   
                <City>#XmlFormat(city)#</City>
                <State>#XmlFormat(state)#</State>
                <Country>#XmlFormat(country)#</Country>
                <PostCode>#XmlFormat(postcode)#</PostCode>
                <Latitude>#XmlFormat(latitude)#</Latitude>
                <Longitude>#XmlFormat(longitude)#</Longitude>
                <CountryCode>#XmlFormat(countryCode)#</CountryCode>
                <AreaCode>#XmlFormat(areaCode)#</AreaCode>
                <Phone>#XmlFormat(phone)#</Phone>
                <Fax>#XmlFormat(fax)#</Fax>
            </Plant>
             </cfoutput> 
        </PrevuPlant>
        </cfxml>
        <!---Convert back to a string--->
        <cfset myvar=toString(xmlobject)>
        </cfprocessingdirective>
    <cfreturn myvar>
    </cffunction>
</cfcomponent>
Can anyone please tell me where I am going wrong, or how the output for a XML feed called from a CFC should look in a browser etc?
Thanks

Answer 1

Hey Dan....thanks for the prompt reply.
I added the wsdl and this is what I get when I call the service from this cfm page: http://www.prevu.tv/xyzTest.cfm
Have never seen output like this.  Is this correct?
The web service I'm writing is also for some .net developers so it may be that I need to output as string also - this discussion has not taken place yet.