VNC on 7.1_122

Hi all,
New here and looking to get some sort of help on a very frustrating problem I seem to keep having. We use the model C10LE here at work for our stores and it seems very recently with the newer versions purchased from Dell we're running into some strange issues. We have ran into several stores that have received these new thin clients who have accidentally restored the machines to factory default via the check box on the shutdown menu. This typically wouldn't be that much of a problem, but on firmware version 7.1_122 suddenly we have lost the ability to log in via VNC to enter in the more complicated manual settings. Older firmware versions still work with VNC such as 7.0_217. Our ini file seems to be fine:

#Enable VNC and settings
maxvncd=1
vncpassword=xxxxxx00 ( not really password )
vncprompt=no

Everything else is obviously working correctly, it's just very frustrating. Could someone confirm that something else is changing via this new firmware and a way to correct this? It would be very helpful! Thanks

Dan