TabContainer cannot have children of type.....

Recently, I encountered the problem quite similiar to the one above.....

TabContainer cannot have children of type
'System.Web.UI.WebControls.Repeater'

to be precise...

I googled quite a bit for this error, but could not find much about it.. No wonders.. It was a careless mistake that I had made. Here is the control that caused this issue....

<cc1:tabcontainer id="tabToolbox" runat="server">
<cc1:tabpanel id="pnl" headertext="Most Popular">
<contenttemplate>
<asp:repeater id="rptMostPopular" runat="server">
<itemtemplate>
<asp:linkbutton id="lnkPopular" runat="server" text=""></asp:linkbutton>
</itemtemplate>
</asp:repeater>
</contenttemplate>
</cc1:tabpanel>
<cc1:tabpanel id="pnl2" headertext="Most Viewed">
<contenttemplate>
<asp:repeater id="rptMostViewed" runat="server">
<itemtemplate>
<asp:linkbutton id="lnkPopular" runat="server" text="">&jt;/asp:linkbutton>
</itemtemplate>
</asp:repeater>
</contenttemplate>
</cc1:tabpanel>
<cc1:tabpanel id="pnl3" headertext="Most Emailed">
<contenttemplate>
<asp:repeater id="rptMostEmailed" runat="server">
<itemtemplate>
<asp:linkbutton id="lnkPopular" runat="server" text=""></asp:linkbutton>
</itemtemplate>
</asp:repeater>
</contenttemplate>
</cc1:tabpanel>
</cc1:tabcontainer>

Well...... A very simple reason for getting this error, even on the designer and also at runtime..
I FORGOT THE TAG "RUNAT=SERVER" WHILE DESCRIBING THE TAB PANELS AND therefore could not get the tab-panels to be server side...

This is what raised the issue.

A simple addition of RUNAT=SERVER solves the issue...


Hope this would help someone in need... :)

--Ashutosh