after changing root directory admin** not working

[romen]

Hi,
I m new in prestashop. i am using this cms in localhost xampp(localhost/prestashop). but now i have changed it(localhost) and configure all like config folder setting. now front end is working well but i am not able to access admin page(localhost/admin01) when i am accesing this path it's giving login page. when i m logined there then without producing any error it's going back to same login page (http://localhost/admin01/login.php?redirect=index.php). i am too worried bcz i have deleted my old content. and here i m not able to access login pls.
pls suggest me how i will get admin page..
thanks

[Patric]

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