Need help on parametization

SCRIPT I have used to do parameterization:
 import sys
import string
import random
from java.lang import String
from java.net import URLEncoder
from net.grinder.script import Test
from net.grinder.script.Grinder import grinder
#import D:\grinder scripts\uids.txt

class TestRandomise:
          def __init__(self, uids):
                          self._users = []
                          infile = open('uids.txt', 'r')
                          for line in infile.readlines():
                                          self._users.append(string.split((line),','))
                          infile.close()

          def getUserInfo(self):
  #      "Pick a random (user, password) from the list."
                          return random.choice(self._users)

PROPERTIES file for my script:
grinder.processes=1
grinder.threads=1
grinder.runs=1
grinder.script=grinder3.py

grinder.jvm.arguments=-Dpython.home=D:\grinder-3.0.1\lib

ERROR I am getting:
grinder.processes=1
grinder.threads=1
grinder.runs=1
grinder.script=grinder3.py

grinder.jvm.arguments=-Dpython.home=D:\grinder-3.0.1\lib
could you please help in the process if used above is wrong
 we are using grinder 3 version.
Thanks



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