Run-Time bindings - nightmare

Hello vb-world fans !

I am moving slowly through ADO and I ran to a problem I already had once but @ that time I didn't care about it and did a workaround. But now I want to solve it. Soooo ....

I have a combo -> User selects a record -> BoundText returns ID and I want to display the respective records in another combo. Doesn't look hard, does it? /Let's use a simple example: In one combo you have all surnames and when you select for example Moore it will populate the other combo with Karl, Peter, Josh etc./

I have created a command that selects the records from the table and I thought that when I just add the WHERE clause to the commandtext at run-time it will work. But oh ah ...
When I set the command text to the new value "SELECT ... WHERE ..." nothing happens and combo stays empty. Even after changing the commandtext I rebind the combo -> no change.

So ... looks simple to me but I can't figure it out.
Anybody?
TIA.

could u show the code where u have trouble?

Sure but before I do that it might be more simple if you could just give me a "walkthrough" :)

Maybe I am doing something wrong. I am using ADO ComboBox which I have binded to DataEnvironment and One of its commands in design time. This Combo works fine. Then I have another combo which is being binded @ run-time. However I am just guessing here how to bind it.

Ok, here is the code:
PEOPLE_LEFT and PEOPLE_RIGHT are constatnts that define the SQL ("SELECT Sn+','+Fn AS FullName FROM Names WHERE OrID=.... ORDER BY FullName")

VB Code:

If dbcboOrg.MatchedWithList Then
        Set newCOM = New ADODB.Command
                newCOM.CommandText = _
            PEOPLE_LEFT & _
            dbcboOrg.BoundText & ")" _
            & PEOPLE_RIGHT
        Set newCOM.ActiveConnection = deZakLis.cnDBZakLis
        newCOM.CommandType = adCmdTable
        newCOM.Prepared = True
        dbcboLudia.RowMember = newCOM.Name
        dbcboLudia.ListField = "FullName"
        dbcboLudia.ReFill
        dbcboLudia.Visible = True
        dbcboLudia.SetFocus
        ....

Hope it is clear. Before using newCOM I tried using a command that was created in the DataEnvironment but when I changed it's commandtext it showed no results.