variable not declared, can possibly not be accessed due to it's security level

Hi,
I got a problem with a variable (sqlausgabe) not being called due to the above error. I tried various possibilities in code behind but to no avail. What am I missing?

Here the aspx code:
<%@ Page Title="" Language="VB" MasterPageFile="~/site.master" AutoEventWireup="false" CodeFile="reference.aspx.vb" Inherits="reference" %> <asp:Content ID="Content" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <div id="textarea"> <div class="text3"> <h1><%= Resources.text.referenc %></h1> <div class="c1"><%= Resources.text.reference1 %></div><br> <div class="c1"><%= Resources.text.reference2 %></div><br> <div> <%= sq ...