I had the very same problem this afternoon, well for a couple of days if I'm honest. MFI were trying to help but over the phone it's not that easy to describe. However if you look at this webpage http://www.crown-imperial.co.uk/file/Luxury%20Drawer%20Box.pdf and go to step 7. You will see the screw adjustment, look at the photo where it says drawer front removal. Locate this on the side of your drawer, you'll need 2 screwdrivers, one to push up the square bit of metal the other to insert into the cross, turn this cross clockwise and the fixing will release.
heather reynolds
July 2008