Which do you use for your Enter Find Mode button?
Enter Find Mode 
Enter Find Mode [pause]
If you used the second step, clear the pause check box and test your buttons again.
Thank you Phil!
I was useing the second one, and it worked after I clear pause check box.
I see now I can perform find by press Enter key, is it possible to perform find through a script running by a button in this case?
And there are other options:
You can click a button that enter's find mode and pauses. After entering data as search criteria, the user clicks continue to continue the paused script and it performs the find.
Your users can enter criteria into global fields and then click a button that uses the data in the global fields to construct find requests and then use them to perform a find.
A button click can perform a script that does not use user input to perform a find, it can use data included in the script as find criteria or data in the database can be used by such a script as find criteria.
Oh I see,
Thank you Phil!!!