Creation of EDT Relation

Hi,

I am trying to create EDT relation but its not working.here are the steps I followed

1.I created EDT 

2.I created a table , drag and drop the EDT to this table.

3. created index on the EDT field in table.

4.in EDT properties Referance Table property I have given Table name.

expanded EDT and in TableReferences I have chosen the EDT field of the table.

5. created a child table , I drag and drop the edt field . when I open the table it is not showing any lookup on that field

can any one suggest me where did I make mistake?