Re-connect Issues

I am trying to reconnect with meter but not able to make a connection success.

To reconnect, First I am using a close() method and then use the initializeConnection() method.

Getting error: GXDLMSConfirmedServiceError: ServiceError Read exception. Service UNSUPPORTED

It looks that connection is not closed properly. Can you please help us in this.

private void close() throws Exception {
IGXMedia media = mDevice.getMedia();
if (media.isOpen()) {
try {
readDLMSPacket2(mClient.releaseRequest());
}
catch(Exception e) {
//All meters don't support release. It's OK.
}
GXReplyData reply = new GXReplyData();
readDLMSPacket(mClient.disconnectRequest(), reply);
media.close();
}
}