Motorcycle Riders Tell Me If you Have This Problem?

I recently got myself a scooter because I have a full size Chevy Silverado and with gas prices I have been getting killed at the pump. The scooter has been great but I have been having this one problem. When I come up to an intersection where there are no other cars at a stop light. The scooter does not trip the sensor. So I will sit there in the middle of the night forever. I have tried everything. Including now I go up the wheelchair ramp and hit the button to cross in the crosswalk. So I wondered all you motorcycle riders do you have this problem? Is there something I can do? I have done the flick my high beam at the light and nothing works. Does anyone know how these things work and what can I do? (Besides doing the wheelchair ramp thing).