"Cannot create a file when that file already exists." error

I am using Advanced Installer Enterprise and my requirement is to build an installer that downloads/installs an .exe setup file from remote location.

I followed these steps:

1. 
   

   Create a project using Enterprise template.

   
   


2. 
   

   Create a Featured-Based package using New URL Prerequisite (with correct Display Name, URL, and Silent install parameter /SILENT).

   
   

But whenever I run my new installer, I get the follow error (see image below) when it finish downloading my .exe setup file from remote location.

Is this an Advanced Installer error or is this an error from my OS?

I am using Windows 7 with Advanced Installer 11.8.