sahni

We had been traveling and when we got back in may i noticed my Lexus won't start. (i could unlock and get in). So i just changed the battery and everything was fine. And again i had to go out for 2 weeks, when i came back I was unable to even unlock the door with my remote and now i am stuck. Is there a problem with the remote as i still see the red light on the remote. Please advise. What is another way to unlock my door.