pubsub creating a collection node

I have installed 2.1.11 and trying to create a pubsub collection node. Here is my create:

iq type="set" to="pubsub.localhost" id="create1"
pubsub xmlns="http://jabber.org/protocol/pubsub"
create node="a" /
configure
x xmlns='jabber:x:data' type='submit'
field var='FORM_TYPE' type='hidden'
valuehttp://jabber.org/protocol/pubsub#node_config/value
/field
field var='pubsub#node_type'
valuecollection/value
/field
field var='pubsub#collection'
value/value
/field
/x
/configure
/pubsub
/iq

however, when I review this in psi servide browser it shows up as a "leaf". I do see /home is a collection and "/home/localhost" is a leaf.

here is my mod_pubsub:
{mod_pubsub, [ % requires mod_caps
{access_createnode, pubsub_createnode},
{ignore_pep_from_offline, true}, % reduce resource comsumption, but XEP incompliant
%%{ignore_pep_from_offline, false}, % XEP compliant, but increases resource comsumption
{last_item_cache, false},
{plugins, ["dag", "hometree", "flat"]}
]},

i assume it is configuration issue!

thanks
James