Filtering from touch buttons

I'm using ms access 2013
i have a project where i need to create a touch screen jukebox.
my problem is that i have a textbox and a list box.
the list box has all my track and i'm filtering from the textbox.
when i use my keyboard the filter works fine from the textbox.
but when using the touch screen buttons even though letters appear on my textbox, the filter does not work.

any idea how to make my textbox filter work from the on screen touch buttons?
thanks