Assuming mouse input is working, are you able to open/import a chart via the File menu? If so, does keyboard input at least work in the Windows file browser dialog that comes up to select a file for import?
Edit: I wonder, if you bring up the on screen Windows keyboard, does manipulating that virtual keyboard with the mouse while EOF is the foreground problem seem to send keyboard input to EOF?
Edit 2: Here is a keyboard testing program that comes with the Allegro 4 source code. Please give this a try and let me know whether it reports keyboard input:
I had deleted the program from my computer, and went to redownload it today to try your suggestions. I opened it up and the key functions worked.
It seems to have worked itself out.
Thanks for all your suggestions.