Implemeting IPortable

I was implementing Import/Export for the help module and came across an issue.  How do I get the items to show in the Action Menu?  I included the Business Controller class in the Module Definition and implemente the IPortable Interface in my code but still had no luck.  Iwas missing something.  Thanx to Vincenc for the answer.

"There's a column in the DesktopModules table to specifiy Supported Features. Can't remember the actual codes but a number 3 includes ISearch and IPortable."

So I put 3 into the table and voila Import/Export now show on the action menu.

Now I gotta go see what the other numbers do.