Thanks for the reply... That is not the experience i am having though.
I have an existing cluster of 109's running code 6.4.2.6-4.1.1.11_52666. When attempting to join a 105 to this cluster the access point displays the green power and ethernet and solid 2.4 and 5 radio lights in red. The access point then restarts after 20 or so minutes and displays the same.
I have confirmed that the 105 is currently running code 6.3.1.8-4.0.0.9_47220 and the Aruba cloud server is contactable and working on the existing cluster of 109's. The 105 access point has also been reset to factory settings.