You have successfully installed JoomlaStats, but it's seems to do nothing?
Than you probably didn't activate it. This FAQ describes the possible ways to activate JoomlaStats.

There are 3 ways to activate JoomlaStats:

B.t.w. 1: Only 1 method is needed and only 1 should be used.
B.t.w. 2: You can change to an other method anytime.
B.t.w. 3: If no activation methode is used, all data remains, but no new data is collected.

1. By installing and publishing mod_jstats_activate module (recommended)

PRO	CON
This method allow You disable particular pages from counting. Further than understanding Joomla, no html/php knowledge is needed.	Some fine tuning could be necessary depending on used site template.

This is done by:

[You should be still logged into the back end (Administration) part of your Joomla site]
Choose menu item "Modules", then "Site Modules"
Make sure mod_jstats_activate is published (if there is an x in the row then click on it)
Module mod_jstats_activate should be activated as first (or as last if performance is required)

2. By adding some lines into the site template

PRO	CON
Should work on all site templates. A little bit more performant.	You have to look at the template code and find the right position. If Your site use many templates, You must edit all of them.

This is done by:

[You should be still logged into the back end (Administration) part of your Joomla site]
Choose menu item "Site", then "Template Manager", then "Site Templates"
Mark your default template and select "Edit HTML"
Insert following text directly after/under the '<body>' statement: (or after </body> tag if performance is required)
For Joomla 1.0.x:
    <?php
    if (file_exists($mosConfig_absolute_path.'/components/com_joomlastats/joomlastats.inc.php'))
        include_once($mosConfig_absolute_path.'/components/com_joomlastats/joomlastats.inc.php');
    ?>
For Joomla 1.5.x:
    <?php
    if (file_exists(JPATH_SITE.DS.'components'.DS.'com_joomlastats'.DS.'joomlastats.inc.php'))
        include_once(JPATH_SITE.DS.'components'.DS.'com_joomlastats'.DS.'joomlastats.inc.php');
    ?>
Use the "Save" button

3. By installing and publishing bot_jstats_activate bot/plugin

This method is no longer supported!

PRO	CON
This is the most easy (and fool-proof) way to activate JoomlaStats. No further configuration at all.	You will NOT be able to see the real page-titles within JoomlaStats.

This is done by:

[You should be still logged into the back end (Administration) part of your Joomla site]
Choose menu item "Mambots", then "Site Mambots"
Make sure bot_jstats_activate is published (is there is an x in the row then click on it)

This method is no longer supported!