Truclient Protocal-Authentication pop up message while executing test in controller

Hi ,

I developed my  Truclient IE script with windows authentication.

I am getting Authentication pop up(UserName, Password) when i execute a script in controller with multiple users

I recorded the Truclient script in my laptop and try to execute the scripts with multiple users in Server machine

I am not passing any User id and password in that script since doesn't have web_set_user() option in truclient

Please help me on this ASAP if you come across the issue