Image field of custom module

Hi,
I have developed a module using Product SDK module.I have a field named Thumbnail which can save an image. it's exactly like product image! but the problem is, I cannot show it on List and Detail view. when I use <sf:imageField... I have "Error parsing.." message. 
this is my list view control:
FYI: I have no problem in Backend to save and image 

<%@ Control Language="C#" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.ContentUI" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.PublicControls.BrowseAndEdit" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.Fields" Assembly="Telerik.Sitefinity" %>


<telerik:RadListView ID="ProjectList" ItemPlaceholderID="ItemsContainer" runat="server" EnableEmbeddedSkins="false" EnableEmbeddedBaseStylesheet="false">
    <LayoutTemplate>
    <div class="projects-wrap project-list-wrap project-list-wrap-expanded">
    <div class="paging-container">
    <div class="paging-container"><span class="paging-btn prev disabled">Prev</span><span class="paging-btn next">next</span></div>
    <div class="project-list">
    <div class="project-list-mask">
        <ul>
            <asp:PlaceHolder ID="ItemsContainer" runat="server" />
        </ul>
        </div></div></div></div>
    </LayoutTemplate>
    <ItemTemplate>
        <li>
            <h3>
                <sf:DetailsViewHyperLink ID="DetailsViewHyperLink1" TextDataField="Title" ToolTipDataField="Description" runat="server" />
            </h3>
        <div class="thumb"><sf:ImageField ID="thumbnailImageField" runat="server"  DataFieldType="Telerik.Sitefinity.Model.ContentLinks.ContentLink"  
   DisplayMode="Read" DataFieldName="Thumbnail" /></div>
            <div class="desc">
<a href="#" class="active">Latest Project News</a>
<sf:DetailsViewHyperLink ID="FullStory" Text="View Project" runat="server" CssClass="sfnewsFullStory" />
<a href="#">Register Interest</a>
</div>


            
            <sf:ContentBrowseAndEditToolbar ID="BrowseAndEditToolbar" runat="server" Mode="Edit,Delete,Unpublish"></sf:ContentBrowseAndEditToolbar>
        </li>
    </ItemTemplate>
</telerik:RadListView>
<sf:Pager id="pager" runat="server"></sf:Pager>

I sent my entire module in ticket  482445 in hope of having fast and complete answer :)

Cheers,
Majid

Hi All,
Is there anyone who has any solutions?! I really don't know what is the problem.
Any help would be appreciated.  

Thanks

Hello Majid,

 Your support ticket has been answered, the issue is not reproduced here with your module. Please check the support ticket and see if you could provide some more information.