I have just setup a report to get data from a SharePoint list, however the results dont return any fields that start with the OWS_ prefix. I can only see lots of system fields.

Any ideas? Is it my query?

<Query>
<SoapAction>schemas.microsoft.com/.../SoapAction>
<Method Namespace="http://schemas.microsoft.com/sharepoint/soap/" Name="GetList">
<Parameters>
<Parameter Name="listName">
<DefaultValue>Announcements</DefaultValue>
</Parameter>
</Parameters>
</Method>
<ElementPath IgnoreNamespaces="True">GetListResponse{}/GetListResult{}/List/Fields/Field</ElementPath>
</Query>