[jQuery] Extending jQuery.fn and Wordpress issues

[jQuery] Extending jQuery.fn and Wordpress issues


Hi!
I'm building a jQuery (1.32) plugin for use with Wordpress (2.85).
My problem is that when i'm extending the jQuery.fn object, the
function is not added to jQuery.fn.
Suppose that the plugin is a simple one like the following.
jQuery.fn.zapp = function()
{
alert("zapp!");
}
It is registered in jquery.zapp.js like this:
(function($)
{
jQuery.fn.zapp = function()
{
alert("zapp!");
}
})(jQuery);
When trying to use the plugin in document.ready, the function is not
recognized. If i take a look at jQuery.fn in firebug the function is
not registered.
I have the same problem if I declare my plugin in the original
jquery.js file, as well as in the same document as my document.ready
call.
The only situation that works is when i declare the plugin INSIDE
document.ready.
To me, this is really strange. Am I missing something completely
obvious?