visual-studio-2005-expres

fatal error C1900: Il mismatch between 'P1' version '20060201' and 'P2' version '20050411'

I compile my project with VIsual Studio 2005 Express Edition, and get this linking error. Can anyone suggest how to solve that? ...

To deploy the web application made using VIsual Studio Web Develper tool 2005 express edition

I have installed Web Developer Tool with .NET fraework 2.0 . How can i deploy the pages made via this and see its working dynamically on my browser window. Also the by-default language is VB, can i change by default script page to C# scripting if i have C# module installed in my system ...