Java EE (Java Enterprise Edition) General Discussion

Hi,
sorry but my writing English ist verry bad.
I have a problem with the connecting to my db.
If i'll connect over a Java standalone application it works without any problems.
But now i've a JSP application and if I effect this i get the following error message:

This side isn't available. Possibly technical difficulties arose or you should examine the settings of the web-Browser ...
ERROR: Server or DNS cannot be found Internet Explorer 

Here is my code:
sqlTest.jsp:

<%@ page import="java.sql.*" %>
<%@ page import="javax.sql.DataSource" %>
<%@ page import="javax.naming.*" %>

<h1>Test</h1>
<%

try 
{ 
	Context initContext = new InitialContext();
	Context envContext  = (Context)initContext.lookup("java:/comp/env");
	DataSource ds = (DataSource)envContext.lookup("jdbc/myoracle");
	Connection conn = ds.getConnection();
	Statement stmt = conn.createStatement ();
	ResultSet rset = stmt.executeQuery("select * from ordner");
	out.println("<table><tr><td>Nr</td><td>Name</td></tr>");
	while (rset.next()) 
	{
		out.println("<tr><td>"+rset.getInt("id")+"</td><td>"+rset.getString("bezeichnung"));
	}
	out.println("</table>");
} 
	catch (Exception e) 
	{
		out.print("<font color=red>Exception</font><br>");
	    out.println(e);
	    out.print("<br><font color=red>Stacktrace</font><br>");
	    e.printStackTrace();
	}
%>

part of server.xml:

<Context path="/strutsTest" docBase="C:\Dokumente und Einstellungen\febelsha\Eigene Dateien\workspace\strutsTest"
            debug="5" reloadable="true" crossContext="true" antiResourceLocking="false" antiJARLocking="false">

 <Resource  name="jdbc/myoracle" auth="Container"
            type="javax.sql.DataSource" 
            driverClassName="oracle.jdbc.driver.OracleDriver"
            url="jdbc:oracle:oci:@geheim.de"
            username="test" password="testpw"
            maxActive="20" maxIdle="10" maxWait="-1"/> 
</Context>

I use the Tomcat 5.5.20 with JDK 1.5.0_09. Is ist possible, that either Tomcat or JDK is defect?
Otherwise i have no idea.

I hope you can solve the problem or can give me any information

Sorry because of my English

regards
KalleWirsch