I googled the problem and saw alot of recommendations including changing the database user and password and editing it in the configuration.php.
Instead, I decided to contact my host. They requested for my cPanel login details. After some minutes, the problem was resolved and my bulk sms site was restored. When I asked them what went wrong, I was told it was caused by a problem with the MySQL server. .
So, if you experience such problem, try to talk to your host before making changes to your config file.
Have you experienced same? How were you able to resolve it?
Make use of Smilleys Codes