I assume you're using nxTools with dZSbot, and didn't take the time to read the config/manual?
Code:
11. If you use dZSbot, you must enable the misc(dZSbotLogging) option in the nxTools configuration file.
Code:
#
# - Enable dZSbot compatible logging, for alternative sitebot support.
# - However, some features will not be available. The invite channels for dZSbot
# are pre-defined, so invite targets will not work (SITE INVITE <irc nick> [target]).
#
set misc(dZSbotLogging) False