Drupal newbie requires advice - almost got it I hope.

Installed and activated node relationship module and all other relevant modules.
Created 2 new content types in CCK, conference and stream. The objective is to reflect a parent child relationship where a conference is the parent and may have zero or many streams.

For content type:conference
Created a field_stream, of type Node Reference and Widget Type: autocomplete text field.
In global settings set Content types that can be referenced: to stream, View used to select the nodes: noderelationship_noderef
Relationships ERD shows "Conference refers to stream".
Node Reference Extras tab, Reference field: Stream, Referred types: stream, Required:No, Cardinality:1 Search and reference view:Grid Style Create and reference: checked on.

For content type:stream
Relationships ERD shows "Conference referred from stream".
Node Reference Extras tab, Could not find node reference fields referring to other content types from Stream.
Back reference settings: Conference / Stream placed in fields region.

Saved all changes.
Start to create a Conference.
Get to Stream field which presents 3 icons (view, search and reference, create and reference.)
Select create and reference and successfully create a stream "Executive Interest".
Following placed in conference stream "Executive Interest [nid:7]" after completion of stream create.

Return to Conference and try to save Conference but get message "Stream: this post can't be referenced."
Remove content of Conference stream field and saved conference.
From Conference/Stream used search and reference to locate "Executive Interest" stream. (This content was created)
Click on apply but pop up still shows "Currently selected Stream: non"
Keyed "Executive Interest" into Conference/Stream field but "Stream: this post can't be referenced."

I appear to be close to a solution but cannot overcome this last issue.