Why is this WCF service not recognizing the UriTemplate parameter?

Question

I've created the following RESTful WCF service, which works just fine when running it in VS.

[OperationContract]
[WebGet(ResponseFormat = WebMessageFormat.Json, 
    UriTemplate = "/sales/start={start}&end={end}")]
List<Sales> GetSalesByDate(string start, string end);

However, when deploying this to my test server (running Win2K3 and IIS6) I received the following server error:

Operation 'GetSalesByDate' in contract 'ISalesService' uses GET, but also has body parameter 'start'. GET operations cannot have a body. Either make the parameter 'start' a UriTemplate parameter, or switch from WebGetAttribute to WebInvokeAttribute.

Obviously I have already made 'start' a UriParameter. So can anyone tell me why an exception is being thrown?

EDIT: For reference, here is my configuration file:

<?xml version="1.0"?>
<configuration>
    <system.serviceModel>
     <services>
      <service name="Services.SalesService">
       <endpoint behaviorConfiguration="webBehavior" 
           binding="webHttpBinding" 
           contract="Services.ISalesService"/>
      </service>
     </services>
     <behaviors>
      <endpointBehaviors>
       <behavior name="webBehavior">
        <webHttp/>
       </behavior>
      </endpointBehaviors>
     </behaviors>
    </system.serviceModel>
</configuration>

Answer 1

I bet it is that the dev machine has SP1 and the server does not.

http://blogs.msdn.com/endpoint/archive/2008/08/22/rest-in-wcf-part-ix-controlling-the-uri.aspx

Answer 2

It turns out /sales/start={start}&end={end} is not a valid Uri (duh!). After a little trial and error I finally figured this out. Tweaking the UriTemplate with a '?' solved the problem.

[OperationContract]
[WebGet(ResponseFormat = WebMessageFormat.Json, 
    UriTemplate = "/sales/?start={start}&end={end}")]
List<Sales> GetSalesByDate(string start, string end);

Thanks for your help!