WinPE 3.1 issue adding driver using DISM

Question

I have a USB capable of booting with WinPE3.1 (win 7)
To this winPE3.1 wim image, I tried injecting a driver using :
dism.exe /image:C:\WinPEMount /add-driver /driver:< path
to driver .inf file >
The adding of driver was successfull, But on booting this image, the driver is not working (I get errors in my program when I use the driver functionalities)
After booting, I installed the same driver using devcon.exe, it works fine (My program is able to use the driver functionalities).
I dont want to have a script install the drivers every time when it boots, I would like to add the driver to the image offline.
What is the difference between these two processes and what could have gone wrong in the first case?
Edit: I couldn't find a correct section for this question hence posted here. Moderators please move to appropriate section if you can.
Thanks,
Basavesh

Answer 1

Hi,
What is the error message? To add a drive to an offline winPE image , please make sure to follow steps in the links below:
Add Device Drivers on an Offline Windows PE Image
http://technet.microsoft.com/en-us/library/dd799289(v=ws.10).aspx
WinPE: Add drivers
http://technet.microsoft.com/en-in/library/dn613857.aspx
After you add the driver, you can first verify the driver
Dism /Get-Drivers
You must unmount the image and commit the change after you have modified it. such as:
dism /unmount-wim /commit
If issue persists, then please check if the following files exist, upload them to OneDrive for further analysis:
%windir%\Panther\CBS.log
%windir%\inf\Setupapi.dev.log
%windir%\inf\Setupapi.offline.log
Yolanda Zhu
TechNet Community Support