cannot call methods on autocomplete prior to initialization

I am working on autocomplete functionality with textbox using HttpHandler. But i have got error like as cannot call methods on autocomplete prior to initialization; attempted to call method 'AutoCompleteHandler.ashx'. I am using following code.

 

JQuery Libraries-

 

 

JSCode-

 

$(document).ready(function () {
$('#<%=txtSearch.ClientID%>').autocomplete('AutoCompleteHandler.ashx');
}); 

 

AutoCompleteHandler.ashx code is following-

 

<%@ WebHandler Language="VB" Class="AutoCompleteHandler" %>

Imports System
Imports System.Web
Imports System.Data.SqlClient
Imports System.Configuration
Imports System.Text

Public Class AutoCompleteHandler : Implements IHttpHandler

Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
'context.Response.ContentType = "text/plain"
'context.Response.Write("Hello World")
Dim SHGName As String = context.Request.QueryString("q")
Dim conn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("YesBankStr").ConnectionString)
Dim cmd As SqlCommand = New SqlCommand
cmd.CommandText = "Select cSHGName from SHG where cSHGName like ''+@SearchSHGName+'%'"
cmd.Parameters.AddWithValue("@SearchSHGName", SHGName)
cmd.Connection = conn
Dim sb As StringBuilder = New StringBuilder
conn.Open()
Dim sdr As SqlDataReader = cmd.ExecuteReader
While sdr.Read
sb.Append(sdr("cSHGName")) _
.Append(Environment.NewLine)
End While
conn.Close()
context.Response.Write(sb.ToString)
End Sub

Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property

End Class