[Lynne]

I am guessing you are using a reverse proxy on the server - all the IPs on your site are showing as the same IP. If so, you need to open your config.php file and uncomment the lines near the bottom of the page and fill in the information, like this:

/* #### Reverse Proxy IP #### 
If your use a system where the main IP address passed to vBulletin is the address of a proxy server 
and the actual 'real' ip address is passed in another http header then you enter the details here */

/* Enter your known [trusted] proxy servers here. You can list multiple trusted IPs separated by a comma.*/
$config['Misc']['proxyiplist'] = '127.0.0.1, 192.168.1.6';

/* If the real IP is passed in a http header variable other than HTTP_X_FORWARDED_FOR, then you can set the name here; */
$config['Misc']['proxyipheader'] = 'HTTP_X_FORWARDED_FOR';