I can't really see you image, as it is too small on my Netbook screen. I use the Hercules RMX with Cross and CrossDJ and it runs just fine.
Sometimes if you don't choose the right audio set up, then nothing works.
Please see my image. This is how I my RMX set up
Audio Panel.jpg
In the soundcard drop down (first option) you need to choose something like "Hercules DJ Console MK4 ASIO" if it appears. If there is a option like this, choose it and then close and re-open Cross and see if you have your buttons back

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