i want to add a custom filter control to filter a cmsrepeater

looked at the documentation here http://devnet.kentico.com/docs/5_5R2/devguide/index.html?using_datasource_web_parts.htm

and also this faq - http://devnet.kentico.com/FAQs/Web-parts---Controls/Why-my-custom-filter-does-not-work-in-aspx-templat.aspx

but still can't get my datasource to filter. on inital load it loads the datasoure but when i debug, it passes the correct wherecondition and sets that to the datasource in the aspx.cs but all records are still pulled back.

here is my code for the aspx template.

<%@ Register Src="~/Controls/Filter.ascx" TagName="Filter" TagPrefix="cms" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<div id="report">
    <div>
        <div>
            <h2><asp:Literal ID="PageName" runat="server"></asp:Literal></h2>
        </div>
    </div>
    <article>
    <cms:Filter ID="filter" runat="server" FilterName="test"/>
    <cms:CMSDocumentsDataSource ID="datasource" runat="server" FilterName="test" Path="/%" ClassNames="Oxera.Publication" />
    <cms:CMSRepeater ID="repeater" runat="server" FilterName="test">
    <ItemTemplate>
        <div class="event">
           <asp:Literal ID="Topic" runat="server"></asp:Literal>
        </div>
    </ItemTemplate>
    </cms:CMSRepeater>
    </article>
    <aside>
        
    </aside>
</div>
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="FooterPlaceHolder" Runat="Server">
</asp:Content>

here is the code behind

 protected void Page_Load(object sender, EventArgs e)
    {

        filter.OnFilterChanged += new CMS.Controls.ActionEventHandler(filter_OnFilterChanged);
        repeater.ItemDataBound += new RepeaterItemEventHandler(AllReports_OnItemDataBound);
        repeater.DataSource = datasource.DataSource;
        repeater.DataBind();
        
    }

    protected void AllReports_OnItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            DataRowView drv = (DataRowView)e.Item.DataItem;

            Literal topic = (Literal)e.Item.FindControl("Topic");

            topic.Text = drv["Topic"].ToString();
        }
    }

    void filter_OnFilterChanged()
    {
        filter.WhereCondition = filter.WhereCondition;
        datasource.WhereCondition = filter.WhereCondition;
        repeater.WhereCondition = datasource.WhereCondition;
        repeater.ItemDataBound += new RepeaterItemEventHandler(AllReports_OnItemDataBound);
        //repeater.DataSource = datasource.DataSource;
        repeater.ReBind();
    }

here is the code behind for my custom filter control

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CMS.Controls;
using CMS.GlobalHelper;
using CMS.CMSHelper;
using CMS.PortalControls;
using CMS.SiteProvider;
using System.Data;

public partial class Controls_Filter : CMSAbstractBaseFilterControl
{
    protected override void OnInit(EventArgs e)
    {
        SetupControl();

        base.OnInit(e);
    }

    /// <summary>
    /// PreRender event handler
    /// </summary>
    protected override void OnPreRender(EventArgs e)
    {
        // Check if the current request is a postback
        if (RequestHelper.IsPostBack())
        {
            // Apply the filter to the displayed data
            SetFilter();
        }

        base.OnPreRender(e);
    }

    private void SetupControl()
    {
        if (this.StopProcessing)
        {
            this.Visible = false;
        }
        else if (!RequestHelper.IsPostBack())
        {
            InitializeYear();
            InitializeMonth();
            InitializeoTopic();
        }
    }

    private void InitializeMonth()
    {
        // Initialize options
        this.Month.Items.Add(new ListItem("Jan", "Jan"));
        this.Month.Items.Add(new ListItem("Feb", "Feb"));
        this.Month.Items.Add(new ListItem("Mar", "Mar"));
    }

    private void InitializeYear()
    {
        // Initialize options
        this.Year.Items.Add(new ListItem("2012", "2012"));
        this.Year.Items.Add(new ListItem("2011", "2011"));
        this.Year.Items.Add(new ListItem("2010", "2010"));
    }

    private void InitializeoTopic()
    {
        // Get administrator uder
        UserInfo admin = UserInfoProvider.GetUserInfo(CMSContext.CurrentUser.UserID);
        if (admin != null)
        {
            // Get custom table provider
            CustomTableItemProvider ctip = new CustomTableItemProvider();
            if (ctip != null)
            {
                // Get all topics
                DataSet teams = ctip.GetItems("Oxera.Topic", null, "Topic ASC");
                if (!DataHelper.DataSourceIsEmpty(teams))
                {
                    // Bind topics to drop-down list
                    this.Topic.DataSource = teams.Tables[0];
                    this.Topic.DataTextField = "Topic";
                    this.Topic.DataValueField = "Topic";

                    this.Topic.DataBind();

                }
            }
        }
    }

    /// <summary>
    /// Generates WHERE condition based on current selection.
    /// </summary>
    private void SetFilter()
    {
        string where = null;

        // Generate WHERE condition based on team selected
        if (this.Topic.SelectedValue != null)
        {
            where = String.Format("Topic ='{0}'", this.Topic.SelectedValue);
        }

        if (where != null)
        {
            // Set where condition
            this.WhereCondition = where;
        }

        this.RaiseOnFilterChanged();
    }
}

Am i using the correct datasource control? is this able to work as it does using the portal template?

can i have a quick response on this please