Only QwtPlot working. No graph in PyQtGraph and MatPlot

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Hi I am trying to plot my data and are having some trouble. The problem is that only QwtPlot is able to plot my data. I like PyQtGraph the best so i would like to use this. At first glance it looks like it doesn't receive any data, but when i look at the Y-axis it autoscrolls according to the data on the topic. The X-axis is not moving thou.

I am able to plot other topics with both PyQtGraph and MatPlot, so this is an event only occuring when plotting this topic.

This is the message I am sending:

Header header

string[] name float64[] position float64[] velocity float64[] effort

I am trying to get the position on the plot.

Does anyone know what I'm doing wrong here?