Can't get the key less remote on 2000 Ford Mustang?

I have two keyless remotes for my car and both don't work when I'm outside my car…

HOWEVER, it works perfectly fine when my driver side door is open. When I lock it with the door open, it honks twice instead of once to confirm the alarm is armed.

Anyone have any idea how to fix this, or just any possible problems?

You need your mechanic to look at it.

Hi yes it means you need top spend MONEY getting it fixed.

Ford usually put the remote receiver inside the driver's door, so that may explain the door needing to be open. As to the remotes not working all the time, a factory dealer car re-program the remotes for you.