Vb 2008 express Bound listbox disables other controls

[Steve36445]

Can you help me please?
I have a listbox bound to a database on a form, all works fine, I can select items from the list ok.
However, I have a checkbox and a textbox on the form , I cannot change the check state of the checkbox and the textbox will not accept the focus, when I click on them.

If I use the listbox in unbound mode the checkbox and textbox work fine.

Any ideas,

Thanks,

Steve