Topic: Error "You can't run Lumion more than once at the same time"

[nhatgiang1993]

I install Lumion 4.5 on my laptop, my laptop have  NVIDIA GT635M graphics card 
when I open Lumion 4.5, Lumion start and automatic close  after that
I open lumion again, Lumion had an error "You can't run Lumion more than once at the same time". But in the version 3.0.1, Lumion'd still ran very well, nothing happend.=, and come to this version ( 4.5) even version 4.0.2 have a same problem too. And one more thing, when I open in the Intel Graphics Mode, It starts @@
what wrong with Lumion or my laptop???
PC config :
 NVIDIA GT635M vs Intel HD Graphics 4000
 Intel Core i5-3210M CPU 2.5Ghz
8GB Ram
What do i have to do to make it work?
have a nice day everyone, please help me

[peterm]

Hi nhatgiang1993

Would you please add your Lumion 4 license key to your forum Account (click here, scroll to the bottom and enter your license number).