Check the permissions on the directory (MembersPath/user_ips) and on the files within user_ips.
It should be 777.
As for the line containing the member's public name and number being above everything else, I have no clue.
I had a quick look at the files included with the mod, and changed couple of things... You should download the archive again and overwrite the existing
ubb_lib_idle.cgi (CGIPath) and
cp_user_ips.pl (Templates).
I hope that fixes your problem.
