Java Security

Hi all, please can somebody give advice on this...

I get different results from hashing a password using the same code, but on different machines:

Machine 1: Windows 2000, US English version, java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode))

password: P/vNwCWGJvy4ofo0WKW9Kw==

Machine 2: Windows 2000 Korean version, java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)

password: P/vNPz/8uKH6NFg/Kw==

Please note the different results of the hashed password.

Here is the code I use:
MessageDigest sha = null;
try {
sha = MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e) {
LoggingManager.error(this, "Exception: ", e);
}
byte[] tmp = password.getBytes();
sha.update(tmp);
com.sun.net.ssl.internal.www.protocol.https.BASE64Encoder b64Enc = new com.sun.net.ssl.internal.www.protocol.https.BASE64Encoder();
String md5enc = new String(sha.digest());
String encodedPassword = b64Enc.encodeBuffer(md5enc.getBytes());

Whats the reason for the different results and how can I overcome this problem`

Thanks for your help in advance!

Bernd