SanDisk Clip Jam Firmware 1.05 Download and Installation Instructions

Hi, I am trying to update a Clip Jam running Firmware version 1.03. The most recent version is 1.12. When I try dragging that into my root directory and unplugging the player from my laptop, nothing happens.  When I try clicking it on directly from the root directory, it says that the file format is not supported.   I tried updating to 1.05 rather than 1.12, but I had the same problem.  Help!