Ahora tengo:
saludio.aspx
<%@ Page language="c#" Codebehind="saludo.aspx.cs" AutoEventWireup="false" Inherits="test.WebForm1" %>
<html>
<form runat="server">
Saludare desde mi clase: <asp:label id="lblSaludo" runat="server" />
</form>
</html>
-- ERROR --
Server Error in '/' Application.
--------------------------------------------------------------------------------
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: Could not load type 'test.WebForm1'.
Source Error:
Line 1: <%@ Page language="c#" Codebehind="saludo.aspx.cs" AutoEventWireup="false" Inherits="test.WebForm1" %>
Line 2:
Line 3: <html>
Source File: c:\inetpub\wwwroot\pruebas\aspnet\saludo.aspx Line: 1
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
Por eso se lo habia quitado, pensaba que eso era lo mal, pero quizas es cierto, el error este dentro de saludo.aspx