Parser Error

When I publish any website on a server I get the following error:
 
Server Error in '/mando' Application.
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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 the assembly 'App_Web_5ywjud0q'. Make sure that it is compiled before accessing the page.
Source Error:
Line 1:  <%@ page language="C#" autoeventwireup="true" inherits="_Default, App_Web_5ywjud0q" %>
Line 2: 
Line 3:  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&q ...