Android Question gps

i was not abble to display the latitude ang longitude then i click button. can somebody help me
my code

Sub Button6_Click
If gps1.GPSEnabled=False Then
'Msgbox(1,23)
ToastMessageShow("Please enable your device's GPS capabilities", True)
'StartActivity(gpsClient.LocationSettingsIntent)
Else
'Msgbox(1,22)
Main.rp.CheckAndRequest(Main.rp.PERMISSION_ACCESS_FINE_LOCATION)
'Msgbox(1,25)
gps1.Start(0, 0)
'Msgbox(1,2)
ProgressDialogShow("Waiting for GPS location")
gpsStarted = True
Msgbox(1,4)
End If
End Sub

Sub gps_LocationChanged (gpsLocation As Location)
'ProgressDialogHide
'userLocation=gpsLocation
'gpsClient.Stop
Msgbox("LATI:" & gpsLocation.Latitude,"")
Msgbox("LONG:" & gpsLocation.Longitude,"")
'StartActivity("actDisplayMap")
End Sub