Problem with custom webcontrol

I want to create a button that implements an interface I have designed. I have done the same for a label and it worked like a charm. But the button is giving me a headache... here is the code:

VB Code:

mports System.ComponentModel
Imports System.Web.UI
Imports COmpany.Common.Web.Interfaces
 
<ToolboxData("<{0}:LocalizedButton runat=server></{0}:LocalizedButton>")> Public Class LocalizedButton
    Inherits System.Web.UI.WebControls.Button : Implements ILocalizable
 
    Private _textId As Integer
    Private _isLocalized As Boolean
 
 
 
 
 
    <Bindable(False), Category("Behavior"), DefaultValue("")> Public Property IsLocalized() As Boolean Implements ILocalizable.IsLocalized
        Get
            Return _isLocalized
        End Get
        Set(ByVal Value As Boolean)
            _isLocalized = Value
        End Set
    End Property
 
    Public Sub SetText(ByVal text As String) Implements ILocalizable.SetText
        Me.Text = text
    End Sub
 
    <Bindable(False), Category("Behavior"), DefaultValue("")> Public Property TextId() As String Implements ILocalizable.TextId
        Get
            Return Me._textId
        End Get
        Set(ByVal Value As String)
            Me._textId = Value
        End Set
    End Property
End Class

The same thing worked for a label...

Here is the result I get when I do dra/drop to the webform:

VB Code:

<cc2:LocalizedButton id=LocalizedButton1 runat="server"></cc2:LocalizedButton<!--EndFragment-->
    </BODY></HTML></cc2:LocalizedButton><!--TRIDESIGNCOMMENT-,TRIDESIGNCOMMENTEND-TRIDESIGNPRECOMMENT-EndFragment-->

If I remove the bad html code it works beautifully!!!! But it is very annoying to have to do cleanup for every control I add. What is the problem here??

kind regards
Henrik