Histogram does not show any trends.

I have a VMSpc running on my coach. Everything works well except for the Histogram

I have 6 items on my Histogram and I know that all get valid data because they all work on other gauges and I am using a bar graph as a legend which shows the readings. However, on the Histogram, the trends/lines just stay on the bottom and do not respond to show the values of the actual parameters selected.

I am using an HP laptop with detachable screen so that it acts like a tablet. It is running Windows 10. I have not had any other issues with the laptop and there is sufficient memory available.

Can anyone help me solve this problem???