Session Manage With Yii->App->Login,not Get Accessing From Andriod App

I have manage my session by yii->app->login ,I m using it by webservice,I am getting username,password by function,& than statting session by yii->app->login.but,when by accessing it by android app,after successfuly login,when I send other request,it is not getting & while comparing for authorization,getting not login .