UFT doesn't highlight and click a WebCheckBox of a pop-up

I'm using UFT to automatize some Web GUI Tests using VB Script, I have to click on a WebCheckBox of a pop up (called Dialog) but it doesn't work. I clicked the WebCheckBox and used object spy to drop the object and UFT pasted that line:

Browser("A").Window("B").WinObject("Internet Explorer_Server").Click

I understood that WinObject("Internet Explorer_Server") it's a generic object.

Could someone help me?