[jdev] add, del contact from gateway

[Bruno Bechler Machado]

Hy,
i'm tryng to add a contact to my msn account using this code:

public void addContact(XMPPConnection connection, String contact, String
gatewayName)
{
Roster roster = connection.getRoster();
       String absoluteFriend = contact + "@" + gatewayName + "." +
connection.getServiceName();


       roster.createEntry(absoluteFriend, contact, new String[]
{"group1"});
}

but i'm having a problem, and i dont know how to solve, example:


addContact(xMPPConnection, "[EMAIL PROTECTED]", "msn");

Error at the console:
<iq id="9F0m8-4" to="[EMAIL PROTECTED]/Smack" type="error"><query
xmlns="jabber:iq:roster"><item jid="[EMAIL PROTECTED]@msn.myservice" name="
[EMAIL 
PROTECTED]"><group>group1</group></item></query><errorcode="400"></error></iq>