Mailing Label code calls hooks for tokens, but does not apply them to the label

The action "Generate Mailing labels" calls the hooks "hook_civicrm_tokens" and "hook_civicrm_tokenValues". But the values for the custom hooks are never placed on the mailing label.

I have also changed the "global settings" for address so the mailing label format is specified as:

{contact.joint_greeting} {contact.addressee} {contact.street_address} {contact.supplemental_address_1} {contact.supplemental_address_2} {contact.city} {, } {contact.state_province}

{ }

{contact.postal_code} {contact.country}

But when I generate my mailing labels, the new token ( in my case "contact.joint_greeting" is ignored.

I added print statements to the file "CRM/Contact/Form/Task/Label.php" so I can verify that my hooks are getting called.

I was testing the code
--------------------------------------------------------------------
else {
$found = false;

// we should replace all the tokens that are set in mailing label format
foreach ( $mailingFormatProperties as $key => $dontCare ) {
if ( CRM_Utils_Array::value( $key, $contact ) )

{ $found = true; break; }

}
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and observed that the variable "$mailingFormatProperties" has my token as just "joint_greeting" . It also seems to be looking for the data to fill the label from the $contact variable, not the array returned from the hook.