menu callback path construction It seems there is hardly any documentation on page call backs using URLS

This being the case I have 2 questions:

What is a legal callback path?
and what becomes the URL to access that path?

Here is the code on my custom module:

  $menu['tipFeed/arguments/%'] = array(
'page callback' =&gt; 'tipfeed_create',
'page arguments' =&gt; array(2),
'access arguments' =&gt; array('access arguments page'),
'type' =&gt; MENU_CALLBACK,
);


Here is the function it refers to:

function tipfeed_create($first){
     return 'cool';
}


My module is called tipFeed.

why is the URL http://www.example.com/tipFeed/arguments/1 saying page not found?

Any help would be great, thank you
everything is ok, just try to clear cache and don't forget never, after any change in hook_menu clear cache