Hi Don !
Nice greetings from me the modest person
who developed LUMA.
I am very sorry that it doesn't work well !!!
Problem #1
Maybe instead of entering directly the red numbers
you could also try to left-mouseclick into each respective
red numbered field. Then a little grey square opens to
the right lower corner. If you click this little grey field
you should be able to select the given number
and the result changes immediately.
Problem #2
I don't know, I guess that Mapquest did change their
internet address system, so LUMA is a bit outdated. :-(
But take this congenial link:
http://toolserver.org/~geohack/
You can enter here the LUMA geo coordinates
then must also enter the correct N, S, W or E for
the geographic directions.
And then do it ! >>>>>> click the field "Do it". ;-)
You will be given a great choice of diverse maps
all with your coordinates.
bye-bye, best wishes, hope this helps,
FrankieS