form authenication in mobile by dipal choksi

Question

well i was making the form "authentication form for mobile application" given by dipal choksi .i have problem with this coding.it is not running properly.the login page in the form comes but when i enter the user name and password,the page does not link forward to next page it return to that login page only,it does not get to default page set.if any one have made it please help. shashank