I put yaf into ~/forum. Where in the web.config file do I include the root element?

I put it directly under //configuration but I received the following error upon loading default in the install folder:

WebDev.WebServer40.exe has stopped working


Please help.

Thanks squirrel. I edited Optional File Root Key and Optional AppRoot to value="~/forum" in app.config.

Now I receive: Server Error in '/Site' Application
The only description is: Runtime Error

What am I missing?

<customErrors defaultRedirect="Error.aspx" mode="RemoteOnly"/>

<customErrors defaultRedirect="Error.aspx" mode="Off"/>

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Unable to open configSource file 'app.config'.

Source Error:

Line 5:
Line 6:
Line 7:
Line 8:
Line 9:

Source File: C:\site\web.config Line: 7

Thank you squirrel. Up and running.
Next up integrating into masterpage...