problem with lib_activate.php

hello

i try to customize the style of the admin email in cforms II
i modify in lib_activate.php this lines :

$cformsSettings[‘global’][‘cforms_style’][‘fs’] = ‘style=”color:#555; padding:1em 0 0.4em; font-size: 90%; font-weight:bold; text-shadow:0 1px 0 #fff;”‘;
$cformsSettings[‘global’][‘cforms_style’][‘key_td’] = ‘style=”padding: 0.3em 1em; border-bottom:1px dotted #eee; padding-right:2em; color:#888; width:20%;”‘;
$cformsSettings[‘global’][‘cforms_style’][‘val_td’] = ‘style=”padding: 0.3em 1em; border-bottom:1px dotted #eee; padding-left:0; color:#333;”‘;

but nothing is effective !
and the admin email is alsways send with another style.

do you have any idea, to customize the admin email ? (without doing it for each forms via admin wordpress)

thanks for your response and help

https://wordpress.org/plugins/cforms2/