Ubuntu: User 'uname' is not allowed to use [tool]

I found this cool tool called "incron." I think it will be a great productivity booster, but I am having issues getting it to run.

sudo apt-get install incron
...
Adding group `incron'
...
sudo usermod -a -G incron myname # no luck

incrontab -e # user 'myname' is not allowed to use incron

___ This seems to be a pretty cut and dry problem -- I should be able to get it to "just work"; however, it is not. Is there an easy way to get this running?