Freeze Bar Enable - does nothing?

Hi Guys,

Running 2012 x64 SP1, I've got an annoying problem with feature freeze; regardless of whether I enable or disable the freeze bar in System Options > General, the bar doesn't appear in the featuremanager tree, meaning I can't freeze or unfreeze.  Other guys with the same hardware and software don't have this issue, just poor old me..

Any ideas what the problem could be with this? Or even better a solution?

We're starting to use this on an organisational basis, where we lockdown some of the model when sending it out to collaboration with non-mechanical types with Solidworks access... So it's proving to be a pain when I'm worknig with other peoples locked down models..

Any help's appreciated...

Del

SolidworksUser Interface