无法从服务器上的asp.net运行批处理

I am trying to run batch file from asp.net. It is working correctly on my local machine. but when i deploy webapplication and batch file on the server, I am getting error something like "Access denied". When I change ApplicationPool identity to localsystem i am not getting any error but batch file didn't trigger. I have tried giving username and password for the process object in asp.net but without luck.I am trying to run batch file from asp.net. It