A common issue people face when first migrating/installing their .NET web application is an error which suggests you turn custom errors off to allow a detailed view of the error message. Commonly this will tell you to apply the following code to your Web.config:
<system.web> <customErrors mode="Off"> </customErrors </system.web>
In some situations you will find that this takes no affect, check the following:
- You may have the wrong .NET framework version selected within the control panel. Select ASPNET 1.1 or ASPNET 2.0 (which at time of writing 2.0 also enables .NET 3.5).
- There is a syntax or configuration error with your Web.config. Work through the Web.config section by section, double checking code, database and security configurations.
- If all else fails, start with the bare minimum Web.config and build it up section by section.