whos_online page is running slowly on my server

[wshankga]

Server Host: gator590.hostgator.com (74.52.151.194) Database Host: localhost (127.0.0.1)
Server OS: Linux 2.6.38.7 Database: MySQL 5.1.52
Server Date: 06/21/2011 08:35:32 Database Date: 06/21/2011 08:35:32
Server Up Time: 08:35:32 up 13 days, 8:20, 0 users, load average: 11.09, 10.85, 9.90 HTTP Server: Apache mod_fcgid/2.3.5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
PHP Version: 5.2.17 (Zend: 2.2.0) PHP Memory Limit: 64M PHP Safe Mode: Off
PHP File Uploads: On Max Size: 64M POST Max Size: 64M
Database Data Size: 3,872 kB Database Index Size: 1,093 kB

Zencart 1.3.9h

I've got some slowness issues but mostly in the Admin. When I attempt to do a Whois Online, I end up having to do multiple refreshes to (sometimes) get the info.

Any suggestions?