GtkEntryCompletion using keyboard

Hi, I have tried to use gtkentrycompletion, it works ok if I use the mouse to select an alternative, but if I want to use the keyboard only (which is something my users want to do since they're just typing info in and want to avoid the mouse as much as possible inside the entry screen), then it seems that the gtkentrycompletion keeps losing focus and I cannot move inside the list or select a suggested option just using the arrows and enter or tab. Is there a way to make gtkentrycompletion work without using the mouse to select an option? Thanks! Veronica