Why can't the installer find my kickstart file when it's located on an USB drive on Red Hat Enterprise Linux 5?

Solution Verified - Updated 2011-02-18T13:14:22+00:00 -

Issue

When I put my kickstart file (ks.cfg) on a USB disk and try to kickstart my machine the installer can't find my kickstart file.
Anaconda is not able to find kickstart file on a USB disk.
If the kickstart file is on a USB device (be it a USB external drive or a USB DVD/CD drive), anaconda stalls and prompts the user with a message as follows :
```
Message: Unable to download the kickstart file. Please modify the kickstart parameter below or press Cancel to proceed as an interactive installation
```

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