have you taken off the handles and square bar, and the barrel. to remove the barrel take out the large holding screw on the long strip on the edge of the door, then put the key in the barrel and turn and pull at the same time, the barrel will come out..OR IF YOU CAN TURN IT BY A "THUMBTURN" use that. then the locking strip can be pulled out from the door....
unless the strip is made to go over the top and bottom edges of the door, then more screws will have to be undone...
IAN H., January 2005