I am deploying an ASP.NET MVC3 application in IIS7. I already deployed other applications but they never made use of the App\_Data folder or any additional component such as the Interop library.

I used the one click deployement and I sue the default application pool. When I launch the application I immediately get an error stating:

[web access] **Sorry, an error occurred while processing your request.**

[browse from IIS7] **Could not find a part of the path 'D:\Data\Apps\OppUpdate\App\_Data\Test.xlsx'.**

Then I manually added the App\_Data folder inside the deployment directory and the application starts regularly. Then when it comes to the taks that uses the Interop library, I get the following error:

[web access] **Sorry, an error occurred while processing your request.**

[browse from IIS7] **Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB\_E\_CLASSNOTREG)).**

Is there any way to automatically add the App\_Data folder when using 1 click deploy? How can I register the Interop services?

Thanks you,

Francesco