Problems with third-party Pantone palette

Hi.

I am using a third party Pantone color Palette(for Lexmark C 750 N). I have the fallowing  problem:

When i apply the fill, it is transformed in CMYK, thus not being a pantone fill anymore.

 

On the other hand, when i apply a pantone color from corel's fixed palettes it is seen as a pantone.

 

 

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Furthermore, when I export it to an eps and reopen it, the fill is a pantone, but, when i open it in the printer's software , it isn't listed as a pantone color. (the printer's software recognises and displays all pantone colors within an eps ).