WebSphere Portal V5 Installation

[Chandra Mohan]

We're trying to install WebSphere Portal V5. When the installer ask for the location of the disc, we get the following error:

"Incorrect CD number or Invalid media location" Please re-enter the disc location."

We downloaded the installation files from the IBM Business Partner zone as an image, so they are on the hard drive.

Any Ideas?? Thanks in Advance!