Partial customization file cannot be the same name as the main customization file

I am trying to load a custom xml file from a customer for the user interface using _CUILOAD, first message is:

"Partial customization file cannot be the same name as the main customization file"

when I close that I then get:

"The customization file you are attempting to open is invalid or it contains group which is already loaded"

I edit the xml and saw that they had , I am assuming that the issue is because MAIN already existed in the list when I went to load it.  I edited and changed it to TEST just to give it something different and I get the same error.

I cannot seem to find any other information on what I need to do to make this successful.  Any help is greatly appreciated!  I added both files just in case.

Regards,

Cami L Florence

SEL - FisherUnitech