How do I get the prerequisites to install from my Setup1.msi?

Visual Studio 2005 Profesional:
I am using Windows Installer to create a Setup.msi.
I want users to be able to download a 30 day free trial of my Windows app from my website.
The download worked fine on my development computer.
When I tried it from a friend's computer,
with my download button linked to my Setup.msi file, it tried to get the prerequisits from Microsoft. This is WAY too complicated. I want it to be as simple as possible.
In my Setup properties,
I specified "download prerequisites from the same location as my application"!
I entered my website in the installation URL.
Why did it go to Microsoft instead of downloading it from my website?
I have 3 prerequisites: SqlExpress, dotnetfx and WindowsInstaller3_1.
How do I get the prerequisites to install from my Setup1.msi?
I see subdirectories for those 3 prerequistes in my Setup1\Release folder and on my website.

Prerequistes ????

I have 3 prerequisites: SqlExpress, dotnetfx and WindowsInstaller3_1.
If I deploy via a CD-ROM, it correctly gets them from the CD.
If I download the same Setup1.msi file from the website, it goes to Microsoft.com for the prerequisites. But, that is WAY too complicated for my customers.

You could do what you want with just about any other Non-Microsoft product. Look in the FAQ's and try another installation package.