Developer Workstation Installation

Microsoft Dynamics NAV 2009 and web services should be already installed.
Please, make sure that the web services are also installed. This can be checked in the Windows 'Services' console (Start -> Run -> type 'services.msc'):

NAV 2009 Services

If for some reasons NAV 2009 with web services is not installed yet, you can read about how to do it here:
http://msdn.microsoft.com/en-us/library/dd301330.aspx