Key fob issue

[TiberiusBoxster]

First, yes I searched and could not find this exact issue. When I got the car, the key fob did not work. I replaced the battery and it started working. A couple of days later the light on the key fob was stuck. I followed the directions to reverse it. That worked, but by then the battery was dead in the key fob, so I replaced it again. Now, it lights up but the dash light does not and it does not open the doors or trunks. I found where someone said to put it in the door for five seconds and then press the unlock. That did not work. I found where someone said put it in the ignition for five to ten seconds and then try it. That did not work. The dash light has still not come on.

What do I try next?

Thanks