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Additional information about this error:

MySQL error!

Error establishing a database connection!

(mysql_connect(): Lost connection to MySQL server at 'reading initial communication packet', system error: 113)

1. Are you sure you have typed the correct user/password?
2. Are you sure that you have typed the correct hostname?
3. Are you sure that the database server is running?

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内部的なエラー内容を表示しちゃ駄目でしょう。
レンタルサーバー側の問題かもしれないけど。

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