NetExtender from sonicwall

is anyone using NetExtender from Sonicwall version 2.6.6 having issues where DUO is being ignored? Meaning I have an end user on version 2.6.6 and its not requesting approval from DUO on his phone. Plus I deactivated his account and still allows him to pass in. Another user on version 2.9.274, that account I can deactivate and blocks him.