Installation: I get a "404 Page Not Found" error on Windows 2003 Server

Resolution:
ASP.NET support may not have been enabled when IIS was installed on your server. To fix this issue, go to the Add/Remove Programs applet in the Control Panel, and click on Add/Remove Windows Components. Next, make sure that the Application Server item is checked. After that, pick Application Server and click Details. In the window that appears, ensure that both ASP.NET and Internet Information Services are checked. Finally, go into the Details screen for Internet Information Services, and ensure that the World Wide Web Service is checked. Click OK in all the windows you opened, and when Windows is done updating your setup, JobTraQ should work.

If the previous answer did not solve your issue, your web server may not be set up to allow IIS to use ASP.NET. To fix this, open the Control Panel on your server, and then open the Administrative Tools folder. From there, open the Internet Information Services Manager. In the tree control on the left, open your local server, and go to the Web Service Extensions section. Then, right-click on "ASP.NET v1.1.4322" in the right-hand panel, and click Allow.