MyBB Internal Error

MyBB has experienced an internal error and cannot continue.

Error Type:
(8192)
Error Message:
mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
Location:
File: /home3/romaniin/public_html/mkportal/include/mk_mySQL.php
Line: 44
Code:
41.             $this->db_connect_id mysql_connect$this->obj['dbhost'] ,
42.                                                   $this->obj['dbuser'] ,
43.                                                   $this->obj['dbpasswd']
44.                                                 );
45. 
46. 
47.         
if ( !mysql_select_db($this->obj['dbname'], $this->db_connect_id) ) { 
Backtrace:
File Line Function
/inc/class_error.php 164 errorHandler->output_error
[PHP]   errorHandler->error
/home3/romaniin/public_html/mkportal/include/mk_mySQL.php 44 mysql_connect
/home3/romaniin/public_html/mkportal/include/MYBB/mybb_driverf.php 49 db_driver->connect
/home3/romaniin/public_html/index.php 69 require