Personality DelphiDotNet.Personality is required to load project and is not loaded. Cannot load project.

I am running Delphi 2005 (Ver 9.0.1761.24408).  I am trying to get
started with .Net projects.  When I to open one of the sample
projects
I get the following error:

Personality DelphiDotNet.Personality is required to load project and
is not loaded. Cannot load project.

I put the Install CD back in to make sure that .Net was installed.  I
went through the process and made sure the box was checked for .Net
but I am still getting this error.

Any help would be appreciated.

Regards,
Mark