Using Push XML to configure DSS Keys

[Rob!]

Hello, I'm trying to program DSS Keys via Push XML. The XML below works for a second and then quickly reverts back. Is it even possible to program DSS Keys via Push XML and have the config stick?

$xml = "<YealinkIPPhoneConfiguration Beep=\"yes\"\n";
$xml .= "<Item>linekey.9.type = 16</Item>\n";
$xml .= "<Item>linekey.9.value = 916</Item>\n";
$xml .= "<Item>linekey.9.line = 1</Item>\n";
$xml .= "<Item>linekey.9.label = 916 Frank</Item>\n";
$xml .= "<Item>linekey.9.extension = %NULL%</Item>\n";
$xml .= "<Item>linekey.9.xml_phonebook = %NULL%</Item>\n";
$xml .= "</YealinkIPPhoneConfiguration>";

Any help/direction is appreciated.

Thank you, ...Rob