installer project error :This installation package could not be opened.

Hi every one....

I am having a problem in install the .msi file created by VS2005 using C#.

I created a setup project for windows application by VS2005 using C#. When i click the mySetup.msi its installed successfully in the computer. i copied the mySetup.msi into another computer and try install it,its successfully installed.

My problem is:

I uploaded mySetup.msi into the application1 folder in my webserver. Then i download the mySetup.msi using following url:

http://www.mysite.com/application1/mySetup.msi

Its downloaded successfully then i try to install it it produce the following pop error :

"This installation package could not be opened.Contact the application vendor to verify that this is a valid Windows Installer package"

can anyone have a idea what i have been doing wrong with my installer or i had mistake in my upload or download process

please help me.

thanks in advance.

shankaran.A