1. Log into the Plesk Control Panel for your domain. See Figure 1:

   
   Figure 1. The Plesk Control Panel. Click for a larger view.

   TIP:

   If you log into Plesk with the admin user, you will be in the Server Administration Panel by default. To get to the Control Panel, click on Domains, then on the Control Panel link next to your domain.

   You can also create a user that will log into the Control Panel by default, which will save you a few clicks on day-to-day webmaster tasks. See Control Panel user.

2. Click on the Websites & Domains tab at the top.

   TIP:

   You should notice the default domain that you set up with your subscription here already. If you want to, you can click on it to change its settings.

3. Scroll down to the bottom of this page, then click on your domain name. See Figure 2:

   
   Figure 2.

4. This opens the Hosting Settings for your domain. Under Web Scripting and Statistics, you'll see PHP support (run as and a drop-down menu. The default is Apache module. Select FastCGI application and click OK to save your settings. See Figure 3:

   
   Figure 3.

5. That's it! FastCGI is now enabled for your (dv) 4.0.

For complete instructions, please see this (mt) Wiki article: (dv) 3.5:Run PHP as FastCGI and resolve Apache permission errors.