SOAP / WSDL issue

Using older version of Coldfusion (7 I think?  I know, I know...).  Anyhow, my WSDL echo page used to work, but then it stopped working unexpectedly.  My vendor tells me they are getting the following error:

Error attempting to create Java skeleton for CFC web service; nested exception is: coldfusion.xml.rpc.CFCInvocationException: [coldfusion.xml.rpc.SkeletonClassLoader$UnresolvedCFCDataTypeException : Could not resolve CFC datatype: /kydlgweb/echo.cfc].

Here is my code in the echo page:

<cfcomponent output="no">

  <cffunction

  name="echoString"

  returntype="string"

  output="no"

  access="remote">

  <cfargument name="input" type="string">

  <cfset variables.CartID = arguments.input >

        <cfstoredproc procedure="spPO_Upd_SPGEReg_UpdatePaid" datasource="ProjONE">

            <cfprocparam cfsqltype="cf_sql_varchar" value="#variables.CartID#">

            <cfprocparam cfsqltype="cf_sql_timestamp" value="#Now()#">

        </cfstoredproc>

        <cfstoredproc procedure="spPO_Sel_SpgeReg_SpgeIdByCartId" datasource="ProjONE">

            <cfprocparam cfsqltype="cf_sql_varchar" value="#variables.CartID#">

        <cfprocresult name="rs_District">

        </cfstoredproc>

        <cfstoredproc procedure="spPO_Upd_AdditionalFees_UpdatePaid" datasource="ProjONE">

            <cfprocparam cfsqltype="cf_sql_varchar" value="#rs_District.SPGE_ID#">

            <cfprocparam cfsqltype="cf_sql_timestamp" value="#Now()#">

        </cfstoredproc>

  <cfreturn #arguments.input#>

  </cffunction>

</cfcomponent>

Anybody see anything obvious?