Clicking the mouse at a certain location.

I have searched the whole BBS and can’t find anything on this topic. I am trying to do a mouse click at {-402, 51} and I just can’t figure out how to do it.Here’s the code:

tell application “MacJournal” to activate
– may not need to activate application

tell application “System Events”
tell process “MacJournal”
click at {-402, 51}
end tell
end tell

click at {-402, 51} – You have a negative number for the first coordinate, try a postive number.