xdfb.addOption("http://jabber.org/protocol/ibb");
}
xdb.addField(xdfb.build());
XData xdata=null;
try {
xdata = xdb.build();
} catch (InstantiationException e1) {
e1.printStackTrace();
}
IQSi si = new IQSi(
id, "http://jabber.org/protocol/si/profile/file-transfer",null,