I keep getting this error* what is it? How do I fix it?
 

Database error in vBulletin :

mysql_connect() [function.mysql-connect]: Unknown MySQL server host 'mysql50-38.wc1' (1)
/mnt/stor2-wc1-dfw1/401295/www.blackberryos.com/web/content/forums/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Sunday* October 4th 2009 @ 05:07:23 PM
Error Date : Sunday* October 4th 2009 @ 05:07:33 PM
Script : http://www.blackberryos.com/forums/s...434&styleid=12
Referrer :
IP Address : 206.53.153.154
Username :
Classname : vB_Database


I get it atleast once a day. Same error* just script will be different.
MySQL Version :