ComboBox doesn't update value

Question

Hi all,
I can find tutorial that tell me how to trace the selected
item from a combobox, but can't figure out how to pass that
information into a useful variable. The trace works fine, over and
over, but the other part will only execute first time there's a
change, and not again. Could anyone please give me a clue as to why
that might be? Thank you very much in advance! Here's the code:

Answer 1

HI Ned! Thanks so much for testing it and replying! Yes,
you're right, I did the if statements as a test, because when/if
this works, I'll change those statements to something else. What I
really need to do is pass the data to a string which will complete
a URL.
I guess the fact that this works sometimes and not other
times isn't a good thing ;-) but it's important to know. Your
testing sure helps to offer a clue toward the answer... whatever it
might be. Does anyone have any idea why this code would work
sometimes and not others? Or if anyone can point to the another way
to reliably collect data from a combobox and put it into a
variable, it would be most appreciated. Thanks all!