ComboBox Bounded Components

Hi,

I develop a application for mobile devices using C# and Visual Studio 2005 with .NET Compact Framework 2.0. My application is very sample: have a master form where user browse the records in a grid and a detail form for insert and alter the record's.

The application runs fine when the database is empty. I have a problem with combobox bounded components when the sequence above is executed:

1. After append a some of records end the application;
2. Run the application again (the records was in database);
3. Append new record;
4. Cancel the operation;

The first record of the group is changed without user confirmation. The value of each field is changed for the first value of combobox bounded with then.

Why?

The code below cause the problem:


TableBindingSource.AddNew();

DetailEditViewDialog detailEditViewDialog = DetailEditViewDialog.Instance(TableBindingSource));

detailEditViewDialog.Text = "[New]";

detailEditViewDialog.comboBoxCars.SelectedIndex = -1;

detailEditViewDialog.comboBoxPumps.SelectedIndex = -1;

detailEditViewDialog.comboBoxLines.SelectedIndex = -1;

detailEditViewDialog.ShowDialog();


Somebody can help me?