You will need to create the dedicated application pool first, click here for the details
1. Log into your hosting Control Panel.
2. Go to WEBSITES > Manage Website
3. Click "..." beside the target site, then click "Application Pool", you will be able to select new dedicated pool you just created for your site.
Article ID: 2253, Created: May 21 at 8:33 AM, Modified: June 27 at 2:56 AM