My ISY 99 notifications stopped working over a year ago for no apparent reason. I've tried everything mentioned in all the blogs and nothing worked.
I *finally* came across this which fixed the issue:
"The first thing you have to do is to ENABLE POP in your gmail account without which nothing will work."
It was a Google mail issue and NOT ISY.
Google's Directions:
http://support.google.com/a/bin/answer. ... wer=105694
Thanks!
James