How to click pop-up button using apple script?

Hi Everybody,

I just wanted to know, is there any way to call the Quark Menu, (Menu>>Utilities>>Guide Manager>>Remove or Lock Guides), and click “Remove Guides” button from Guide Manager pop-up window?

i have a script as below, but its only show the Guide Manager pop-up window, but unable to click the “Remove Guides” button.

tell application "QuarkXPress"
	set DocName to name of document 1
	tell document DocName
		tell me to doMenu_QX("Utilities", "Guide Manager...", "")
	end tell
end tell

on doMenu_QX(This_Menu, First_Level, Second_Level)
	tell application "QuarkXPress"
			if Second_Level is "" then
				select menu item First_Level of menu This_Menu
				select menu item Second_Level of menu item First_Level of menu This_Menu
			end if
		on error errmsg number errnum
			display dialog ("An error " & errnum & " has occured" & return & return & errmsg) with icon stop
		end try
	end tell
end doMenu_QX

Hope I think it will able to do using UI scripting, i am not much aware about that so, can you please help me if anybody knows about this?