Hi,
Try this code.
I have this in my master page
<td style="height:450px">
<asp:ContentPlaceHolder ID="CRPPlaceHolder" runat="server" >
</asp:ContentPlaceHolder>
</td>
....
...
<td style="width: 8%; height: 100%" class="ApplicationTitle">
<asp:Label ID="lblVersion" runat="server" CssClass="ScreenHeader" Text="Version 1.1.0"></asp:Label>
</td>
In my content page is have,
<asp:Content ID="Content1" ContentPlaceHolderID="CRPPlaceHolder" runat="Server">
......
......
</asp:Content>
Hope this helps.