AES encryption/decryption in javascript using CryptoJS

I am trying to send AES encrypted messages between javascript and php using a shared secret. In Javascript, I am using the CryptoJS library. In php, I am using mycrypt. I am trying to construct an encrypted message in javascript and then decrypt it in php using a shared key. I can encrypt and decrypt messages with Javascript. I can encrypt and decrypt the same message in php - but the encryption is not the same between the two.

Javascript

var encrypted = CryptoJS.AES.encrypt("Message", "Secret Passphrase");
alert(encrypted);

give

U2FsdGVkX18 + k3pba4l4MbGZfmDjMc1yQ6uj1fg + BGo =

in PHP

<?php
$Pass = "Secret Passphrase";
$Clear = "Message";

$crypted = fnEncrypt($Clear, $Pass);
echo "Encrypted: ".$crypted."</br>";

$newClear = fnDecrypt($crypted, $Pass);
echo "Decrypted: ".$newClear."</br>";

function fnEncrypt($sValue, $sSecretKey) {
return rtrim(
        base64_encode(
                mcrypt_encrypt(
                        MCRYPT_RIJNDAEL_256,
                        $sSecretKey, $sValue,
                        MCRYPT_MODE_ECB,
                        mcrypt_create_iv(
                                mcrypt_get_iv_size(
                                        MCRYPT_RIJNDAEL_256,
                                        MCRYPT_MODE_ECB
                                ),
                                MCRYPT_RAND
                        )
                )
        ),"\0"
);
}

function fnDecrypt($sValue, $sSecretKey) {
return rtrim(
        mcrypt_decrypt(
                MCRYPT_RIJNDAEL_256,
                $sSecretKey,
                base64_decode($sValue),
                MCRYPT_MODE_ECB,
                mcrypt_create_iv(
                        mcrypt_get_iv_size(
                                MCRYPT_RIJNDAEL_256,
                                MCRYPT_MODE_ECB
                        ),
                        MCRYPT_RAND
                )
        ),"\0"
);
}

the output is

Encryption: iqJ0R5ahRP7GpWKtW7 + OBSCGnudDr99VbJC36OQlmgE =

decrypt: message

My question is, why are these different?