Hi,
Other customers have reported a long wait before the radio allows access on 2.6.2: http://community.cambiumnetworks.com/t5/ePMP-2000-and-1000/Serious-issue-with-2-6-2-on-brand-new-Force-180s/m-p/56142#U56142
We're looking into this as a top priority issue.
Thanks,
Sriram