I did something simular a few years ago wherein I had wanted to open a page in the left hand pane based on the content in the NotesView frame.
Basically I had to change my shared action to the following:
@SetTargetFrame("NAV");
@Command([OpenPage]; "Nav1" );
@SetTargetFrame("NotesVIew");
@Command([OpenView];"View1")
HTH,
-Chris
http://www.dominoguru.com