User Tracking for zen 1.3.6 admin config problem!

yesterday i notice that this mod doesn't track any visitors since i last login a couple days ago. so i try to reinstall it again. when i try to upload the user_tracking.sql file, it says

1062 Duplicate entry '999' for key 1
in:
[INSERT INTO zen_configuration_group (configuration_group_id, configuration_group_title, configuration_group_description, sort_order, visible) VALUES (999, 'User Tracking Config', 'User Tracking', 31, 1);]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.then the user tracking config in admin seems to disappear. nothing shows. can someone help me on this..??

The error is saying, that part of the sql was all ready done. Remove this line from the sql and run it on the database again.

INSERT INTO zen_configuration_group (configuration_group_id, configuration_group_title, configuration_group_description, sort_order, visible) VALUES (999, 'User Tracking Config', 'User Tracking', 31, 1);

Thanks a lot..that's really help. It's back on tracking now. I just don't understand why it stop tracking at the first place..

:dontgetit