ASP.NET 1.1 / 2.0 conflict error [solved]

I got this error when trying to run some applications on the same server
as ASP.NET 1.1 and some as ASP.NET 2.0. How do I fix this? The error shows up in the applcation log, and when trying to browse to a page, it says "SERVER ERROR"

It is not possible to run two different versions of ASP.NET in the same IIS process. Please use the IIS Adminstration tool to reconfigure your application to run in a separate process.

In case anyone else needs to know, I solved this by creating a new application pool, and adding the 2.0 apps only to that pool.

You could set the ASP.NET version you want to use in the ASP.NET tab in properties for the virtual directory.