I can't see any lensflare

Hi! i'm adding lensflare to the light in my virtual tour as is explained in this video http://www.youtube.com/watch?v=pazJH1pfsk4 but when i click 2 times to generate lensflare it add only th code but i can't see any effect in the virtual tour
it adds code like this

<lensflare name="lf0" set="DEFAULT" visible="true"  ath="-154.5709" atv="-61.4451" size="0.80" blind="0.60" blindcurve="4.00" />

what's wrong?? coul you help me?? thank you

yes now it works thank you very much!!!