Kontakt 5 on Roland e50 keyboards

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Hello, I have problem getting to work Roland e50 keyboards with kontakt 5.
I downloaded the driver for my keyboards but is only available for Windows XP, so I downloaded another driver called Roland arranger driver. Kontakt has found it, but it doesn't work when I play on Roland keyboards.
I tryied to open sample library ''my own sounds'' on my kontakt and when I play them on the kontakt keyboards with mouse I can hear the voices from my piano, which I think is strange.

Do you know what might be the issue and how to resolve it?

Thank you in advance.