Pyhook script not working in Python windows service.

See more:

Windows

Python

service

I have implemented a script using pyhook to track mouse and keyboard event, and calling this from the python windows service its not calling OnMouseEvent1 and OnKeyboardEvent but for normal execution and while debugging the service its working fine.
can any one help me to sort out the problem.
below is my code.

import pythoncom,pyHook , sys
import datetime
import win32api
import ctypes
last_event = ''
def info(idle_time) :
  try :
    fo = open("testschd.txt", "a+")
  except :
    fo = open("testschd.txt", "wb")
  fo.write(str(idle_time))
def OnMouseEvent1(event) :    
    global last_event 
    if last_event :
        before = (datetime.datetime.now() - last_event)
        print before.seconds
        if before.seconds > 60 :
            info(before.seconds)
    last_event = datetime.datetime.now()
    return True
def OnKeyboardEvent(event) :
    global last_event
    if last_event :
        before = (datetime.datetime.now() - last_event)
        if before.seconds > 60 :
            info(before.seconds)
    last_event = datetime.datetime.now()
    return True
def test() :
    hm = pyHook.HookManager()
    hm.KeyDown = OnKeyboardEvent
    hm.SubscribeMouseAllButtonsDown(OnMouseEvent1)
    hm.MouseDown = OnMouseEvent1
    hm.HookKeyboard()
    hm.HookMouse()
    pythoncom.PumpMessages()

What I have tried:

In the above script i am calling test() method from python windows service(service implemented by using python).