Teleporter lights

I dont know what happened to my computer/game. Everytime when i go to desert and try to travel with those portals, i cant see the light when i click on portal. I installed latest nvidia graphic drivers. Windowsxp home blablabla

Is there someone that has the same problem or know how to help me?

Are you stepping into the circle first to get the sequence?

I think if you don't click the portal lights in the right sequence, the light might not turn on.

Thank you i will try.

simple problem there, just was unsure of what to do

....Now i feel noobish lol, but yes its right when i walk up in the portal and turned around i got the lights blinking thanks guys.