[Solved]help strange combobox

I got a very strange problem with combobox, first ogre app combobox is working fine, but second ogre app combobox can not jump out the list of items, i have add some items. This is the most strange problem i have never seen in my whole life. Anyone have the same problem?

ps: The first ogre app i use resource.cfg to load gui data but in second app i manual create resource group and add resource location by myself, is it effect combobox?

show logs

Well i found the problem, i forget to inject frame enter so the combobox not work properly. haha what a stupid am i.