Could not find driver “thesql” when setting up sourcebans

I'm trying to set up SourceBans on my CS:GO server, but when I tried a sm_reloadadmins I got

14:46:45 sm_reloadadmins
14:46:45 L 02/09/2013 - 17:46:48: [sourcebans.smx] Database failure: Could not find driver "mysql". See FAQ: http://www.sourcebans.net/node/20
14:46:45 L 02/09/2013 - 17:46:48: [sourcebans.smx] Database failure: Could not find driver "mysql". See FAQ: http://www.sourcebans.net/node/20
14:46:45 L 02/09/2013 - 17:46:48: [sourcebans.smx] Database failure: Could not find driver "mysql". See FAQ: http://www.sourcebans.net/node/20
14:46:45 L 02/09/2013 - 17:46:48: [basecommands.smx] "Console<0><Console><Console>" refreshed the admin cache.
14:46:45 [SM] Admin cache has been refreshed.

Does anyone know what this means?

Here's my databases.cfg

"Databases"
{
    "driver_default"        "mysql"

    // When specifying "host", you may use an IP address, a hostname, or a socket file path

    "default"
    {
        "driver"            "default"
        "host"              "localhost"
        "database"          "sourcemod"
        "user"              "root"
        "pass"              ""
        //"timeout"         "0"
        //"port"            "0"
    }

    "storage-local"
    {
        "driver"            "sqlite"
        "database"          "sourcemod-local"
    }

    "clientprefs"
    {
        "driver"            "sqlite"
        "host"              "localhost"
        "database"          "clientprefs-sqlite"
        "user"              "root"
        "pass"              ""
        //"timeout"         "0"
        //"port"            "0"
    }

    "sourcebans"
    {
        "driver"            "default"
        "host"              "****"
        "database"          "****"
        "user"              "****"
        "pass"              "****"
        //"timeout"         "0"
        "port"          "3306"
    }
}