slow jdbc postgres connection

hi i have the following problem:

when i execute the following query via pgAdminIII i get a result within 31ms

Select version()
result: PostgreSQL 8.1

if try to execute the same query using the jdbc-interface from a java-application the same query needs horrible 4756ms.
my jdbc driver is 8.1-409 JDBC 3
my postgres version is 8.1.8
my JRE-Version: 1.5.0_07

Connection pgconnection = null;

// Load the pgSQL JDBC driver
String pgdriverName = "org.postgresql.Driver";
Class.forName(pgdriverName);

// Create a connection to the "test" database
String pgserverName = "10.100.6.245";
String pgdatabase = "test";
String url = "jdbc:postgresql://" + pgserverName + "/" + pgdatabase + "?characterEncoding=UTF8&useUnicode=true";
String username = "user";
String password = "password";

pgconnection = DriverManager.getConnection(url, username, password);

ResultSet pgresultSet;
Statement pgstatement;
pgstatement = pgconnection.createStatement();

String pgquery;
pgquery="SELECT version()";

long start=System.currentTimeMillis();//start time measurement

pgresultSet = pgstatement.executeQuery(pgquery);

long time=System.currentTimeMillis()-start;//end time measurement

//time =4756ms

pgconnection.close();

if i do the similar query on our mysql database, which is on the same local server, i get quick results, so the reason probably cannot be a slow intranet-connection

any help would be appriciated.

regards. stefan
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