Somehow, your programming software is setting the lock bits. Don't touch those: all the bits with LB in the name should be left unprogrammed (i.e., equal to 1; 0 means locked).
You want to change only the clock configuration, per
http://cq.cx/ladder-forum.pl?action=viewthread&parent=409
The datasheet seems to imply that a "chip erase" command will reset the lock bits. So it may be possible to salvage your dead chips, if your programmer is able to send that.