I keep adding a user to a specific security role called lab. The user keeps the rights for a short amount of time then loses them. Any ideas on why the user keeps getting dropped from the role. its one specific user. she has other roles assigned that stick, but others that keep disappearing. using newest dnn.

Issue solved. I use the AD connector. my systems admin added new security groups in AD. some of the group names were the same names as security roles in DNN. Since he didn't add that person to the group in AD it overrode the role in DNN kicking her out everytime she logged into DNN. Once I adder her to the group in AD everything was sorted.