I'm using 'Magazine 1.2' module and for some reason I now cannot update any changes I make in the preferences for it. This has started to happen in the past few weeks. I get a '403 Forbidden' page when trying to save changes: "You don't have permission to access /modules/system/admin.php on this server."

Other module preferences still work and update fine.

I have been doing quite a bit of work with this module lately but mostly just with the templates, not the code. The web hosting has turned off 'register globals' though I don't know what this means or if it is part of the problem.

Am I missing something obvious here or any ideas what I might have done to affect the ability to save preferences for just this one module?

Thanks for any help