by Olumuyiwa Taiwo.
That doesn't sound right. That error is produced if there is a mismatch between what you've typed into the browser address bar and the value of $CFG->wwwroot.
Can you provide the following info:
* The value of $CFG->wwwroot in your config.php
* The external/static IP address (and port number if applicable) that you're typing into the browser address bar
* Your router port forwarding rules