Hi David!

Have you tried to compare your machine settings with another one (in wich hotkeys works correctly)?
Go to VFP Tools menu, and select Debugger to activate debugger.
Click on Tools menu again, and select Options to open VFP settings window.
Hold the left Shift key and click on Ok button.
Alternate to Debugger window and take a look at the Debug Output Window. All your settings are listed.
Now you can compare your settings with the settings of another developer.

Hope this help!