Postback & viewstate problems on dynamictable controls

Hi there,
there is a lot of code, but the substance is quite simple, I have a dynamic table with 3 columns and x rows.
The first column contains IP addresses (readonly=true), the second one the descriptions (readonly=false) and the third one some dropdownlist in order to select the node type. Then an update button to update the db. That was just to give you a general idea.

Here is the page code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="test3.aspx.vb" Inherits="test3" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" r ...