Database connection failed!

Stack Trace:

File: /home/xsms/public_html/medsclinics.com/ijmse/ojs/classes/core/Application.inc.php line 36
Function: PKPApplication->__construct()

File: /home/xsms/public_html/medsclinics.com/ijmse/ojs/lib/pkp/includes/bootstrap.inc.php line 55
Function: Application->__construct()

File: /home/xsms/public_html/medsclinics.com/ijmse/ojs/index.php line 65
Function: require("/home/xsms/public_html/medsclinics.com/ijmse/ojs/lib/pkp/include...")