A user in a group does not have group access?

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http://unix.stackexchange.com – I have a fresh install of ubuntu server 12.10. I have created a group called www-dev and a user called dab. the user is in the group and i can verify that by members www-dev which returns dab. I created a folder called /etc/test and that folder has permissions: drwxrwsr-x root www-dev if i type who i get dab if i go into the folder and type echo 'test' > test i get access denied! I'm sure it's something simple, but i can't figure out why? thanks in advance! (HowTos)