Driver Exception PDO na remote serveri

Zdravím,

mám takýto problém: Vyhadzuje mi:
Fatal error: Uncaught exception ‚PDOException‘ with message ‚SQLSTATE[HY000] [2005] Unknown MySQL server host 'mysql57.websupport.sk:3311‘ (2)' in /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e00ae/nara-design.com/sub/najportal/vendor/nette/database/src/Database/Connection.php:68 Stack trace: #0 /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e00ae/nara-design.com/sub/najportal/vendor/nette/database/src/Database/Connection.php(68): PDO->__construct(‚mysql:host=mysq…‘, ‚najportal‘, ‚password‘, Array) #1 /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e00ae/nara-design.com/sub/najportal/vendor/nette/database/src/Database/Connection.php(116): Nette\Database\Connection->connect() #2 /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e00ae/nara-design.com/sub/najportal/vendor/nette/database/src/Database/Structure.php(164): Nette\Database\Connection->getSupplementalDriver() #3 [internal function]: Nette\Database\Structure->loadStructure(NULL) #4 /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e in /nfsmnt/hosting1_1/d/e/de4b810f-9492–4d47–8586–3667152e00ae/nara-design.com/sub/najportal/vendor/nette/database/src/Database/DriverException.php on line 25

Link: http://najportal.nara-design.com/www/

Avšak napríklad /www/admin zobrazí, keď sa prihlásim, znova exception.
Neviem, čo s tým, pretože na localhoste to išlo všetko v poriadku. V config.local.neon som zmenil prihlasovacie údaje. Host server:port. Do db som už pristupoval cez mysql_connect() a mysql_query(), takže existuje a sú v nej dáta.

Server je od websupportu, je možné, že čosi nemám povolené, alebo na čo som pri konfigurácii mohol zabudnúť?
Viete mi, prosím, poradiť?