cake php issue
new to cakePHP framework...

error shows up when a user tries to login to a site....he belongs to a new category which i have added in a drop down menu for the UI...i think i have made the necessary changes in views, models and controllers....not sure....u can suggest me the places or file i need to recheck......
a login controller file which calls home controller file....but it doesnt seem to call....it just goes on in an infinite loop....and the browser replies: problem loading page: the page isn't redirecting properly.....
the exact error
<title>Problem loading page</title>
<body>
The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept
cookies.
</body>
can anyone help me out?