Design view problem of user control menu

[Vannela]

I have got a user control with this code but i couldnt see
anything in the design view of ascx page
What couls be the problem?

<%@ Control language="C#" AutoEventWireup ="false"
Codebehind="m_t s_coursesched_p opup.ascx.cs"
TargetSchema="h ttp://schemas.microso ft.com/intellisense/ie5
"%>

<%@ Register TagPrefix="iewc "
Namespace="Micr osoft.Web.UI.We bControls"
Assembly="Micro soft.Web.UI.Web Controls, Version=1.0.2.2 26,
Culture=neutral , PublicKeyToken= 31bf3856ad364e3 5" %>

<asp:Panel id="Panel1" runat="server" Height="600px"
Width="200px">

<iewc:Toolbar id="m_ts_course sched_popup" style="Z-INDEX:
101; LEFT: 5px; OVERFLOW: auto; POSITION: absolute; TOP:
63px" runat="server" Height="490px" Width="196px"
Color="Blue" Orientation="Ve rtical" >

<iewc:ToolbarLa bel Text="Popup" ID="
m_popup"></iewc:ToolbarLab el>

<iewc:ToolbarBu tton Text="Schedule" ID=" m_schedule"
DefaultStyle="b order-right:#AD1021 2px Solid;border-
top:#AD1021 2px Solid;font-size:12px;borde r-left:#AD1021
2px Solid;border-bottom:#AD1021 2px Solid;font-
family:Tahoma;c olor:Teal;" HoverStyle="bor der-
right:#Yellow 2px solid;border-top:#Yellow 2px solid;font-
size:12px;borde r-left:#Yellow 2px solid;border-
bottom:#Yellow 2px solid;font-
family:Arial;co lor:Teal;backgr ound-
color:Yellow;"> </iewc:ToolbarBut ton>

</iewc:Toolbar>
</asp:Panel>

Thank you