How should i make my python script work?

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Python

GPS

Hi code project members
i'm developping a python script for tracking which will be uploaded to gm862-gps module
once the evk3 (mother_board) is connected to my laptop by the rs232-usb connector, i uploaded this python code on:

##### Constants #####

TRUE = 1
FALSE = 0
LOOP = 1
SPEEDLIMIT = 30

##### Modules #####

#Use serial
import SER

#Use build in module
import MOD

#Use AT command interface
import MDM

#Use GPS
import GPS

###### General Functions ######

#Debug message
def errorsmg(msgtext):
somme = msgtext #msgtext = msgtext.replace('\r', '\\r')
#msgtext = msgtext.replace('\n', '\\n')
print (somme)

SER.send(msgtext + '\r\n')
#f = open('log.txt','ab')
#f.write(msgtext + '\n')
#f.close()

#GPS status
def gps_status(gpspos):
debugmsg('Retrieving GPS status')

gpspos_parts = gpspos.split(',')

if ( (gpspos_parts[5] == '2') or (gpspos_parts[5] == '3') ): #2D or 3D fix
#debugmsg('GPS fix "' + gpspos_parts[5] + '" ie valid');
status = TRUE
else:
#debugmsg('GPS fix "' + gpspos_parts[5] + '" ie not valid');
status = FALSE

return status

###### SMS Library Functions ######

#Setup SMS
def sms_setup():

debugmsg('Setting up SMS')

MDM.send('AT+CMGF=1\r', 0)
res = MDM.receive(50)#5 sec
MOD.sleep(1)#wait 0.1sec

debugmsg('SMS setup: ' + res)

def testspeed(gpspos):

#debugmsg('Test if speed is over limit')

gpsdataparts = gpspos.split(',')
currentspeed = gpsdataparts[7]
debugmsg('Time is ' + gpsdataparts[0] + ' UTC time')
debugmsg('latitude is ' + gpsdataparts[1])
debugmsg('longtitude is ' + gpsdataparts[2])
debugmsg('heading is ' + gpsdataparts[6])
debugmsg('Speed is ' + gpsdataparts[7] + ' km/hr')
debugmsg('date is ' + gpsdataparts[9])

if (gps_status(gpspos) == TRUE):
debugmsg('Has GPS Fix')
if (float(gpsdataparts[7]) < 60.0):
debugmsg('Speed UNDER the speed limit')

else:
debugmsg('Has NO GPS Fix to be tested for overspeeding')



SER.set_speed('115200','8N1')
SER.send('\r\n--------------------\r\n\r\n')

debugmsg('Running...');

#Set verbose error reporting
MDM.send('AT+CMEE=2\r', 0)
MDM.receive(50)#5 sec
MOD.sleep(1)#wait 0.1sec

#Setup SMS
sms_setup()

#Main loop
while (LOOP==1):

debugmsg('Entering loop')

#Retrieve current position
gpspos = GPS.getActualPosition()

debugmsg('Position: %s' % gpspos)

#Retrieve GPS fix status
gps_statusnow = gps_status(gpspos)

#Save last valid position
#If position fix valid, or none recorded already, use last retrieved
if ( (gps_statusnow == TRUE) or (gps_statusnow == FALSE) ):
testspeed(gpspos)

debugmsg('Powersave for 10 seconds')

#Powersave for 10 seconds
MOD.powerSaving(10)

would you like to tell me why i upload it on the gm862-gps, and it still do not execute ?
thx in advance