Calling the method ReadWBSResourceSpread in SpreadPortBinding will not return data

We're trying to pull WBS Resource Spreads.  We ran the summarizer and can see data in the ADMUSER.SUMTRSRC table, but running the service with the request below will not return data.

Request

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:v1="http://xmlns.oracle.com/Primavera/P6/WS/Spread/V1">

   <soapenv:Header/>

   <soapenv:Body>

      <v1:ReadWBSResourceSpread>

         <v1:WBSObjectId>26094</v1:WBSObjectId>                                   

         <v1:PeriodType>Month</v1:PeriodType>

         <v1:SpreadField>ActualCost</v1:SpreadField>

         <v1:SpreadField>ActualUnits</v1:SpreadField>

         <v1:SpreadField>PlannedCost</v1:SpreadField>

         <v1:SpreadField>PlannedUnits</v1:SpreadField>

      </v1:ReadWBSResourceSpread>

   </soapenv:Body>

</soapenv:Envelope>

Response

<SOAP-ENV:Envelope xmlns:SOAP-ENV="