ASP.NET部署：无法从站点下的虚拟目录访问Bin文件夹程序集

I have an ASP.NET Web application which has 3 projects to handle 3 different layers of the application (UI , BL and Data Access).When i publish the UI project a directory called Precompiled will be created in the solution and Files will be available there.This Folder will have a BIN directory which holds required DLL's(referenced DLL's and DLL of Business Layer project & DLL of DataAccessLayer Project) too. This works fine .NOw i want to use the same BL and DataAcess layer to run multiple UI's (websites). I want to have website called websiteA,WebSiteB,MyWEbSite1,ShyjusWeb etc....I want to create virtual directory for each one of these. SO i created a website and under that i created Virtual directories for the above sites.I put index.asp (of the UI project i had in my solution) in the Folder which is mapping to one virtual directory and when trying to access, I am getting an error like the followingI have an ASP.NET Web application which has 3 p