How to use selectOneList in a updateable data table column

Hi,
Could someone tell me how to use selectOneList (source from a vo X) in an updateable data table column (from another vo Y)?
I successfully created a page with the data table. However, strange things happened:
1) the values populated on the selectOneList column don't match the underlying value in vo Y. in fact, every rows in the column got the same value.
2) when I update one of the rows, the column value in every other rows turns to the new value.
3) when I sort other columns in the table, the values shown in the selectOneList column get toggled between blank and some incorrect value.
I believe it is something related to the fact that the same iterator is used to the source view object. If this is the case, how can I solve it?

See #7 here:
http://radio.weblogs.com/0118231/stories/2005/06/24/jdeveloperAdfScreencasts.html

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