Problem with roster.removeEntry

Hi, I want to use smack.jar to develop a Gtalk robot. When I use roster.removeEntry to delete a friend, the result is : on my gtalk contact list, the entry disappear, and, on the friend’s contact list, the entry of me disappear too. But this is not what I want

What I want is same as the operation on Gtalk. When i delete a friend on gtalk software, the entry disappear from my contact list, but on the friend’s contact list ,I’m still in it.

Can smack.jar do this? How to? Thanks.