Ambiguous match found

Error :
Server Error in '/Web' 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: Ambiguous match found.

Source Error:

Line 1: <%@ Control Language="c#" AutoEventWireup="false"
Codebehind="GeneralTemplate.ascx.cs" Inherits="Web.Service.MasterPages.GeneralTemplate"

TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
Line 2: <%@ Register TagPrefix="uc1" TagName="MainMenu" Src="../UserControls/MainMenu.ascx" %>
Line 3: <%@ Register TagPrefix="Web" Namespace="Web.Web.Controls" Assembly="BLMS.BackEnd.Web.Controls" %>

Source File: /Web/MasterPages/GeneralTemplate.ascx Line: 1


This is actually a weird error, I've faced a lot of problems while deploying and debugging web application developed under asp.net, and these errors are sometimes not quite relevant to the error messages, so have to figure it out by myself. Phew...

Solution : Made a new web directory on IIS outside the default website, for the web application. And it worked like charm!! -.-"""