Why can't I vote for a question I answered earlier?

Question

I put in a question earlier that I never had time to go back and vote best answer for. I tried yesterday to answer it but it won't let me. Is there a time limit or what happened?

Answer 1

Okay..........I'll do it for yah!

Sorreeeeeeeeeeeeee!

You lost!

Answer 2

If you want to answer your own question just go on a different computer. I believe that some people cheat the system and make random questions, answer it themselves, and give them self best answer choice.

Answer 3

because its your own question! you can only vote for others

Answer 4

when more than 4 hrs passes the asker can decide which one wins....star the ones you want to go back to..