Building a .net web application project

[Albert]

When you point the Make VS.NET task at a solution file if a web project is part of that solution it builds without error. However, if I point the Make VS.NET task directly at a web application's .vbproj file I get one of the two following errors. Why?

ERROR 1 (referencing the file using %PROJDIR%\dirname\filename):

8/18/2006 1:55:58 PM: --------------------Starting Build: 'Visual Build Pro Sample Build.bld'--------------------
8/18/2006 1:55:58 PM: Building project step 'Build VBPWebApp'...
Pre-processing...

Building configuration 'Release'...

Microsoft (R) Development Environment Version 7.10.3077.
Copyright (C) Microsoft Corp 1984-2001. All rights reserved.

The project you are trying to open is a Web project. You need to open it by specifying its URL path.
Process completed with exit code 1
8/18/2006 1:56:02 PM: Step 'Build VBPWebApp' failed
8/18/2006 1:56:02 PM: Build ended.

ERROR 2 (using the URL):

8/18/2006 12:52:26 PM: Building project step 'Build VBPWebApp'...
Pre-processing...

Building configuration 'Release'...

Microsoft (R) Visual Studio Version 8.0.50727.42.
Copyright (C) Microsoft Corp 1984-2005. All rights reserved.

The project has not been converted.
Process completed with exit code 1
8/18/2006 12:52:27 PM: Step 'Build VBPWebApp' failed
8/18/2006 12:52:28 PM: Build ended.