Autodesk AutoCAD 2015 silent\unattended installation Guide.

Hi Folks,

I am new to this form and this is my first post. I have been trying to silently install AutoCAD 2015 on windows 7 64 bit OS. I have setup.exe and setup.ini. I have followed below 2 commands line:

1.  " path of exe file" /w /q /i"path of .ini file" /language en-us. -- no result. When I see in task manager that setup.exe ran just 1 min. then exit out. Even I saw event log file. It doesn't have any info. 

2.  " path of exe file" /qn /i" path of .ini file" - No result same like otherone.

Please give me your valuable thoughts and input.

Thanks,

Sri.