OK, I will try.
But why the same thing is happening when I am trying to create a new project?

>Mark,
>
>That error occurs when you have a project that is located in a different location then you copied it to on your machine. Open up the solution file in notepad and change the path to the correct virtual directory you are now using.
>
>>Take a look at this screenshot, please. What's wrong? I am getting that when I am opening a solution I have downloaded from the Web.
>>Same problem when I try to create a new ASP.NET project.
>>
>>http://24.13.50.16/problems/problem1.png
>>
>>Thanks