Hi Forum, I have solved my problem. I read more about alfresco ticketing and below facts solve my problem
1. POST webscript requires user authentication, guest is not possible. 2.Ticket expires when we restart server , In my case while calling my POST webscript at client side i first generate ticket using http://10.4.3.91:8080/alfresco/service/api/login?u=admin&pw=admin
and then append in POST URL.
Thank you Forum i got answer browsing many posts on this forum.