c# - Action Caliburn pour AutocompleteBox - débordement de pile

I currrently have a autocompletebox. When the mouse is entered in the Autocompletebox the action is not firing, I think it's the type of action. A textbox doesn't have a click, what would be an ideal solution to this? My goal is to requery when Keystrokes are made or clicked into.

<RadAutoCompleteBox cal:Message.Attach="[Click] = [UpdateCollection]"/>

UpdateCollection is a simple query

I currrently have a autocompletebox. When the mouse is entered in the Autocompletebox the action is not firing, I think it's the type of action. A textbox doesn't have a click, what would be an ideal solution to this? My goal is to requery when Keystrokes are made or clicked into.

<RadAutoCompleteBox cal:Message.Attach="[Click] = [UpdateCollection]"/>

UpdateCollection is a simple query

Source