Sublime Text 2 Plugin: Timestamp for creation date and last modified date, automatically added and updated.

timestamp.py

"""
Automatically add and update time stamps in your files.
On file open, will replace [timeStamp] with the current date and time.
Currently looks for two instances of this (example below).

To use, place the text [timeStamp] in your template file where you want it.
ex.
//  CREATED: timeStamp
// MODIFIED: timeStamp

When you open this file for the first time, both [timeStamp] will change to
the current date and time. Every save, the MODIFIED line will update.

NOTE: After installing, don't open this file in Sublime Text because it will change
[timeStamp] in the code to the current time. Oops =]
"""
import datetime
import sublime
import sublime_plugin

TIMESTAMP_CODE = 'timeStamp'
TIMESTAMP_PATTERN = 'MODIFIED:\\s*20[0-9][0-9]-\\d+-\\d+\\s+\\d+:\\d+:\\d+(\\.\\d+)?'

class InsertTimestampListener (sublime_plugin.EventListener):
	"""
	When opening file, search for TIMESTAMP_CODE and replace it with current time
	"""
	def on_load (self,view):
		region = view.find (TIMESTAMP_CODE, 1)
		if region :
			timestamp = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
			edit = view.begin_edit()
			view.replace(edit, region, timestamp)
			view.end_edit (edit)
		region = view.find (TIMESTAMP_CODE, 1)
		if region :
			timestamp = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
			edit = view.begin_edit()
			view.replace(edit, region, timestamp)
			view.end_edit (edit)

class UpdateTimestampListener (sublime_plugin.EventListener):
	"""
	On save, search for the MODIFIED line, and replace timestamp with current time
	"""
	def on_pre_save (self, view):
		region = view.find (TIMESTAMP_PATTERN, 1)
		if region :
			timestamp = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
			replacement = 'MODIFIED: %s' % timestamp
			edit = view.begin_edit()
			view.replace (edit, region, replacement)
			view.end_edit (edit)

Hi!
This is not working for me....

i've added on Tools -> New Plugin and saved it than i've a js file with at the top:
// CREATED: timeStamp
// MODIFIED: timeStamp

saved it too and nothing happened...

i've sublime text 3 build 3083