Possibly missed it, the file names wrong in instructions or something, theres no cp_vars_server_load.pl mentioned in directions, unless ones ot assume, but ill check it out:
First you need to upload the follow files:
cgi-bin/cp_server_load.cgi -> To your UBB CGI directory
cgi-bin/ubb_server_load.cgi -> To your UBB CGI directory
variables/vars_server_load.cgi -> To your variables folder
variables/vars_wordlets_load.cgi -> To your variables folder
Templates/cp_server_load.cgi -> To your template folder