Help regarding Google Earth?

I use the flight simulator on a regular bases but today for some strange reason most of the numbers that give me the speed and altitude of the aircraft are not visible. Some of the numbers are visible to me on the scale whilst some are not and I don't understand why. I've tried restarting my computer and even uninstalling and then installing the program but none of those methods proved effective. What can I do to solve the problem? Thanks for any help you can give me.