Add service reference: Use of unassigned out parameter 'XX'

Hi there

I'm currently integrating a web service to AX 2009. When I try to add a service reference in AOT, I got some messages saying:

[Drive:\]...\AppData\Local\Temp\DynamicsAxSvcReferences\<MyWebServiceName>\<WebServiceMainCls.cs(36,25) : error CS0269: Use of unassigned out parameter <Parameter>

But when I use Visual Studio, all works fine. I don't know how to fix. Any Ideas:

The service is public, so you can try it too: https://ws.im.post.ch/3.0?wsdl

Thank you for answers.