Technology code names, eg, AFl, Wri, U1, X7, are hard-coded to each technology slot. They're case-sensitive, too. Attempt to use other values (apart from 'nil' and 'no') in the various tech fields and your game will crash.
I should also point out that a semi-colon indicates a comment; everything on a line that follows a semi-colon will be ignored by the game. Therefore, rewriting the tech codes at the end of each line in @CIVILIZE, as you've done, does absolutely nothing; the codes are listed there purely to assist in editing.