Force refresh of axis

Hi

I'm having a problem with forcing refresh of the x-axis when it changes with time. I have a datetime axis as the x-axis. This should be updated approx. each hour with a new hourly timestamp to the right.
I'm currently setting the maximum and minimum and doing an invalidatePlot of the PlotModel, but this doesn't make the axis refresh. Tried it with data plotted in the plot and without any data plotted in the plot.

How can I make the axis update over time ?

It seems as it was something else that was the matter, it works now.