Simple Find/Replace in Textedit

Question

All I want to do is search a TextEdit document for a word and replace it with another word. For some reason, it's taking me hours to figure out how to do this. And all the scripts I found through google didn't work, so I don't know where to turn to now.
Here's the part of the script that is suppose to be doing the find/replace:
note, TextEdit is already activated earlier in the script
tell application "TextEdit"
tell application "System Events"
tell process "Textedit"
key down command
keystroke "f"
key up command
keystroke "Last Update"
keystroke tab
keystroke "Created"
click button "Replace All" of window "Find"
end tell
end tell
end tell
the script fails at the "click button" part. Up until then, everything works fine. I can even see the Find window open with the "Last Update" and "Created" texts in the right text fields.
Anyone have any suggestions? I'm a noob, so you know, so you can be as sarcastic and condescending as you like in your replies, (not that I expect you all to be like that) but please also find the time slip in a helpful suggestion in there too

Answer 1

Hey Marc
This is what I was able to get working:
tell application "TextEdit"
tell application "TextEdit" to activate
tell application "System Events"
tell process "Textedit"
key down command
keystroke "f"
key up command
keystroke "Last Update"
keystroke tab
keystroke "Created"
keystroke tab
keystroke tab
keystroke tab
keystroke tab
keystroke space
end tell
end tell
end tell
For some reason the Find window that pops up in your script isn't the default TextEdit Find. Having the "activate" command seems to fix that. I could never get it to click the button, so instead of the "click button" command I just tabbed to the command (make sure you have Move Between Controls toggled on, its ^F7 or just select it in System Preferences). After tabbing to the button the space bar activates it.
I hope this helps
-Jonathan