Need help from implementing MUC

Hi,

I have been trying to create a multi user chat using asmack from android.

When I try to create a chat room, got a error "NO response from server"

I am using the following code snippet to create the chat room:

MultiUserChat muc = new MultiUserChat(connection, "myroom@mydomain.com")

muc.create("testroom");

Note: connection is already opened and authenticated