Starting editing a Row as soon as it is Added.

I have an NSOutlineView and what I want to happen is that when a row is
added I want the row that has been added to Start Editing immediately
like when you double click on a row.

I've tried this:

NSObject *p = [treeController newObject];
[treeController addObject:p];

NSManagedObjectContext *moc = [self managedObjectContext];
NSEntityDescription *entityDescription = [NSEntityDescription
entityForName:@"projects" inManagedObjectContext:moc];
NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
[request setEntity:entityDescription];

NSError *error = nil;
NSArray *a = [moc executeFetchRequest:request error:&error];

// Find the row of the new object
int row = [a indexOfObjectIdenticalTo:p];

// Start editing in the second column
[outlineView editColumn:1
                    row:row
              withEvent:nil
                 select:YES]; 

However, it seems that just edits any row in my Outline View.
What have I done wrong??

Josh