i am running into the following error when calling YAF inside of Sitecore,

http://local.meauyaf.com/yaf 

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: Unknown server tag 'YAF:Forum'.

Source Error:

Line 18:

Line 19:

Line 20:

Line 21:

Line 22:

Source File: /yaf/default.aspx Line: 20

The .sln has the following:

<%@ Page Language="C#" AutoEventWireup="true" ValidateRequest="false" %>

There is an error on YafContext ... it keeps saying "YafContext does not exist in current context ... also

There is a folder that has the following objects in the solution:

App_Code >> YAF >> Modules >> Web References >> forum.cs, ForumEditor.cs, RssFeed.cs

if someone could help me modify the code, i will be very appreciative.

Thank you in advance