First, see...
http://www.open-audit.org/phpbb2/viewtopic.php?t=1393
For how it works, you most probably have the following settings wrong.
ie_form_page = "http://openaudit/admin_pc_add_1.php"
non_ie_page = "http://openaudit/admin_pc_add_2.php"
The openaudit part must point to the web host running the OA pages, and must do so either by a resolvable DNS name or by IP address.... so for example if the web host is 192.168.10.10 and is called myserver.mydomain.com, then
ie_form_page = "http://192.168.10.10/admin_pc_add_1.php"
non_ie_page = "http://192.168.10.10/admin_pc_add_2.php"
OR
ie_form_page = "http://myserver.mydomain.com/admin_pc_add_1.php"
non_ie_page = "http://myserver.mydomain.com/admin_pc_add_2.php"
Would both work.
You must also be able to see the web pages from the machine running audit.vbs otherwise you obviously cant post data to them.
If this seems OK, then set
verbose = "y"
online = "yesxml"
ie_visible = "y"
ie_auto_submit = "n"
ie_submit_verbose = "y"
in audit.config, you should see the data being submitted for each PC, you will need to click the submit button, to complete each submission.
If this produces no output, then most probably you cannot connect to WMI, so look in the FAQs for more info, in particular, read through...
http://www.open-audit.org/phpbb2/viewtopic.php?t=1464