Two problems were found with the just published WSE 3.0 July CTP.

    1. The Add Web Reference feature in the July CTP version of Visual Studio 2005 does not generate a WSE enabled proxy.

To work around the problem, modify the generated proxy base class from System.Web.Services.Protocols.SoapHttpClientProtocol to Microsoft.Web.Services3.WebServicesClientProtocol

    2. The Update Web Reference feature in the July CTP version of Visual Studio 2005 will generate an error.

To work around the problem, delete the existing web reference and add it again by  using the Add Web Reference feature. Additionally, you would also need to modify the generated proxy base class from System.Web.Services.Protocols.SoapHttpClientProtocol to Microsoft.Web.Services3.WebServicesClientProtocol

Don't forget that the WSE 3.0 July CTP only works with the Whidbey July CTP which is only available to MSDN Subscribors.

   -Matt