Creating Multiple Rendering Options in Fieldtypes not working

Hi,

I’m testing Fieldtype development and I’m trying to setup a custom replace function :

function replace_hello($data, $params = array(), $tagdata = FALSE)
{
    return "hello world";
}

In my template, I’m calling it that way :

{myfield:hello}

But this is not working, the tag is not parsed and it’s returning this :

{myfield:hello}

Am I missing something or could this be a bug ?

Thanks !

Update : woops, posted it in the wrong forum, could you please move it to the Custom Field API Development forum ? Thanks !