Hi,
*You dont need to mess up your configuration too much - leave everyting like it's working in 3.4.5.X.
NOW..
Uour DHCP is internal or extrnal?
It's sound like u got a PEF/PEFNG issue.
What is the user-role that your usersgetting in version 3.4.5.1 when connecting to SSID
And on what access roles it's based.
Can u please print screen of amount of licesnse installed on your controller in version 3.4.5.1 - and then on version 6.1.3.7
update me in needed details - and i will be able to help you.