Needs Helps with Columns

I am having problems with columns on http://www.neamp.org.  The 2nd Column (Timothy's Column) is smaller than I specified it to be. I am pretty sure that the text on the middle column is causing the column to be smaller. Please look at http://www.neamp.org/default2.asp. This is the size that Timothy's column is supposed to be. Each column is supposed to be 263 in width.

The client uses a rich text editor to edit the content. How do I force the 1st column to stay 263 in width even if the client enters too much text?

Code for 1st Column: <tr>
          <td width="10" height="711">&nbsp;</td>
          <td width="263" valign="top"><%= Content %>&nbsp;</td>
        </tr>

Code for 2nd Column:

<tr>
                        <td width="17" height="799">&nbsp;</td>
                        <td width="263" valign="top"><font color="#666666"><%= HTMLBody %></font></td>
                        <td width="10">&nbsp;</td>
                     </tr>

Timothy's Column is wider now. But it has caused the column to move farther to the right. I don't want that to happen. How do I solve this problem?

Here's the HTML Code for the 2nd Column:

 <img src="spacer.gif" style="width: 263px; height: 1px;"><table width="100%" border="0" cellpadding="0" cellspacing="0" bgcolor="#CCCCCC">
        <!--DWLayoutTable-->
        <tr>
          <td width="11" height="13"></td>
          <td width="300"></td>
        </tr>
        <tr>
          <td height="809"></td>
          <td valign="top"><table width="100%" bordercolor="#990000" border="4" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF">
               <!--DWLayoutTable-->
               &nbsp; &nbsp;
               <tr>
   
                 <td width="290" height="801" valign="top"><table width="100%" border="0" cellpadding="0" cellspacing="0">
                     <!--DWLayoutTable-->
     
                     <tr>
     
                        <td width="17" height="799"></td>
                        <td width="263" valign="top"><font color="#666666"><%= HTMLBody %></font></td>
                        <td width="10">&nbsp;</td>
                     </tr>
                   </table></td>
               </tr>
             </table></td>
        </tr>
        <tr>
          <td height="55"></td>
          <td>&nbsp;</td>
        </tr>
      </table>