Question about Legacy Unison.

I have a Legacy Unison system that I was trying to fix. I plugged the DMX Board in (Lehigh Millenium with Win. 95), and it was working. Something happened and the DMX stopped working and the configuration was gone. I have the config and am going to load onto the system. Was the DMX not working because of the config being gone or what? I'm kind of new to the whole lighting thing. Thanks.

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