Lately i've started working with divs instead of tables. The problem is, when I add more than one modules to a pane, the modules will be placed side by side. I want the modules to be placed below each other. This is some of my code in my skin:

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Skin:

<div id="contentholder1">
    <div id="contentpane" runat="server"></div></div>

Stylesheet:

#contentholder1 {
margin-left:16px;
margin-right:16px;
margin-bottom:16px;
width:468px;
height:auto;
}

Container:

<%@ Control language="vb" CodeBehind="~/admin/Containers/container.vb" AutoEventWireup="false" Explicit="True" Inherits="DotNetNuke.UI.Containers.Container" %>
<%@ Register TagPrefix="dnn" TagName="ACTIONS" Src="~/Admin/Containers/SolPartActions.ascx" %>
<%@ Register TagPrefix="dnn" TagName="TITLE" Src="~/Admin/Containers/Title.ascx" %>

      <TABLE cellSpacing="0" cellPadding="0" align="left" border="0">
        <tr> <TD valign="middle" nowrap><dnn:ACTIONS runat="server" id="dnnACTIONS" /></TD></tr>
        <TR>
          <TD id="ContentPane" runat="server" align="center"></TD>
        </TR>
        </TABLE>