Get PEP event using asmack

I've been trying to listen for PEP event from my server using asmack. I modify the avatar event publish event a little bit on my server side. My android client didn't show the packet on the debugger. I'm using asmack library from https://github.com/Flowdalic/asmack/

<message from='jenggotz@192.168.202.121' to='jenggotz@192.168.202.121/2346608911361516490425217' type='headline'>
    <event xmlns='http://jabber.org/protocol/pubsub#event'>
        <items node='urn:xmpp:avatar:metadata'>
            <item id='111f4b3c50d7b0df729d299bc6f8e9ef9066971f'>
                       <metadata xmlns='my:avatar:metadata'>0,0,0</metadata>
            </item>
        </items>
    </event>
    <addresses xmlns='http://jabber.org/protocol/address'>
        <address type='replyto' jid='jenggotz@192.168.202.121/2346608911361516490425217'/>
    </addresses>
</message>

I've registered the provider for the event before connecting.

ProviderManager pm = ProviderManager.getInstance(); 
PEPProvider prov = new AwawaProvider();
prov.registerPEPParserExtension("urn:xmpp:avatar:metadata",new AvatarProvider());
pm.addExtensionProvider("event","http://jabber.org/protocol/pubsub#event",prov);

AwawaProvider is just an extension of PEPProvider, but I call android logging function on parseExtension.

publicclass AwawaProvider extends PEPProvider {    @Override    public PacketExtension parseExtension(XmlPullParser arg0) throws Exception {        Log.e("PEPAWA", "AS");        return super.parseExtension(arg0);    }}

But the log didn't show it and my stanza didn't shown on the debug log. So I conclude that I don't register my provider in the right way. When I try to get ExtensionProviders on ProviderManager, it shows that I already put it in. Did I miss something in my code?

Thanks in advance