Empty (parent)field in the module list view

[netol]

Hi,

I have a module that works correctly except that the parent field appears empty in the list view.
If I go for example to edit or view the detailed row I see the field correctly. It seems that only occurs with the list view.

I've done an echo of the query:

 echo "<pre>$main_query</pre>"; 
  

as it's pointed here and executing the query at MS SQL Studio the row is returned fine (with the non-empty field).

I don't know the way fix this. Can anyone help me please?

Thanks

Pere.