use applescript to control app

[wangxm]

I'm trying to use the applescript to control the app:

ignoring application responses
tell application "System Events" to tell process "Flux"
click menu bar item 1 of menu bar 2
end tell
end ignoring
do shell script "killall System\ Events"
delay 0.1
tell application "System Events" to tell process "Flux"
tell menu bar item 1 of menu bar 2
click
click menu item "Disable" of menu 1
tell menu item 7 of menu 1
click menu item "for an hour" of menu 1
end tell
end tell
end tell

But it keeps popping out error saying it can't find the process named "Flux":

error "System Events got an error: Can’t get menu bar 2 of process "Flux". Invalid index." number -1719 from menu bar 2 of process "Flux"

Anything that you guys could help me?