[development] &$node in nodeapi

[luca capra]

Good evening,

I'm writing a custom module, with a call to hook_nodeapi (on php 5.3, 
latest drupal 6)
I update some cck fields, but looking at the saved node page, these 
fields are empty.

Seems that after the hook, cck fields lose their values.

function mymod_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL){
    switch($op){
       case "insert":
       case "update":

            my_fill_cck( &$node );

            // here cck are populated
            // krumo( $node );
        break;
        case "load":
            // viewing node, cck are empty :(
            // krumo( $node );
            return array();
        break;
    }
}

Any idea is really appreciated.
Thank in advance.

Best regards,
Luca