Getting "XMPPException $ XMPPErrorException: XMPPError: service-unavailable - cancel" when creating a group using XMPP (4.1.3)

Question

I am facing a problem when creating a chat group using XMPP (4.1.3).

My code

try{ // Get the MultiUserChatManager MultiUserChatManager manager = MultiUserChatManager.getInstanceFor(ClosrrService.xmppConnection); Log.e("Connection : ", ClosrrService.xmppConnection.toString()); // Get a MultiUserChat using MultiUserChatManager MultiUserChat muc = manager.getMultiUserChat(" dayaroom@conference. "+Constants.HOST); // Create the room and send an empty configuration form to make this an instant room muc.create("testbotdaya"); muc.sendConfigurationForm(new Form(DataForm.Type.submit)); }catch (Exception e) { e.printStackTrace(); } 

In the above code, I get an exception in muc.create("testbotdaya"); , and the exception is

 org.jivesoftware.smack.XMPPException$XMPPErrorException: XMPPError: service-unavailable - cancel W/System.err﹕ at org.jivesoftware.smack.PacketCollector.nextResultOrThrow(PacketCollector.java:232) W/System.err﹕ at org.jivesoftware.smackx.muc.MultiUserChat.enter(MultiUserChat.java:311) W/System.err﹕ at org.jivesoftware.smackx.muc.MultiUserChat.createOrJoin(MultiUserChat.java:400) at org.jivesoftware.smackx.muc.MultiUserChat.createOrJoin(MultiUserChat.java:376) W/System.err﹕ at org.jivesoftware.smackx.muc.MultiUserChat.create(MultiUserChat.java:354) W/System.err﹕ at com.rappier.closrr.chat.grpupchat.CreateGroupActivity.createGroup(CreateGroupActivity.java:82) W/System.err﹕ at com.rappier.closrr.chat.grpupchat.CreateGroupActivity.onClick(CreateGroupActivity.java:64) 

Please help me. Thanking in advance.