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cannot run Framework 3.5 under a .Net 4 website

Posted By:      Posted Date: September 15, 2010    Points: 0   Category :ASP.Net
HiI have a website that is configured to run .Net framework 4 mode. And then I need to add another website that runs .Net Framework 3.5 as a sub site to the one that run .Net 4. So in IIS 7 I added my website that run .Net 4 as a web application (.Net 4 application pool), and then I added my .Net 3.5 website as a sub application (.Net 3.5 application pool)So my structure look like this...localhost\myDotNet4Website\myDotNet35webSiteI can run the .Net 4 website, but when I try to run the 3.5 version I get a error on this line..<compilation debug="true" targetFramework="4.0">Is this configuration not possible, or can I change it work?

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