Project class not accessible when adding a web service reference

I am not sure if this is the right place to ask, but anyway..

I am going by this tutorial and doing everything as it says, but there is still a problem.

When adding a web service reference in Visual Studio to "http://ServerName/ProjectServerName/_vti_bin/psi/project.asmx" (substituting servername and projectservername, obviously) and naming it "ProjectWebSvc" it gives me access to some classes like ProjectDataSet, but not Project

What did I do wrong and how can I fix it?