ASP.NET runtime error : Ambiguous Match found

Question

Recently, my team converted ASP.NET project from .NET 1.1 to .NET 2.0. Everything is pretty good so far except for one web page.

This is the error message I got when I tried to open this page:

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: Ambiguous match found.

Source Error:

Line 1: <%@ Control Language="c#" AutoEventWireup="false" Codebehind="Template.ascx.cs" Inherits="eReq.Web.WebControls.Template.Template" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %> Line 2: Line 3: function ExpandCollapse_Template(inBtn, inSection, inSectionID) {

Source File: /WebControls/Template/Template.ascx
Line: 1

-------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053

I tried renaming class and renaming filename but it didn't work.

Anyone have any idea on this?