Proxima Invalid Item owner
Proxima
There is a USERS ONLINE tab in the DASHBOARD area which has that info. If its not currently available via proxima, you may need to build a module to return the info. The session info is stored in the 'session' table
$tbl = jrCore_db_table_name('jrUser', 'session');
probably called 'jr_jruser_session' in the db.
Examples of the SQL queries can be seen in the _jrUser_mysql_session_online_user_count() function in jrUser/include.php
Still haven't setup to debug this yet, but its my guess you're signing on with the admin keys, but then not changing the keys to the returned session value after the login step.
After you authenticate, copy the session_id into the password field.