Cannot subscribe a node that has been published

  1. i’ve create a node from the server by user ‘u1@myserver’:
           <pubsub xmlns='[]('>

and the server responses:

2.the,i changed to user ‘u2@myserver’ to subscribe the node i’ve been created:

           <pubsub xmlns='[]('>

but the server response with an error ‘404’:

<error code='404’type=‘cancel’>

can anyone explain where the problem is , thx so much