need help with anti theft light blinks fast on 08 ford escape

By disconnecting the battery you may have locked yourself out of the system totally. On later model vehicles you need a little tool that saves the vehicles presets if the power is totally lost when you remove the battery form the circuit, if you do that the dealer will have to reflash the electronics to bring the systems back up. I believe there is a warning in the owners manual about removing the battery. So it looks like it will have to go to a dealer.

Try unlocking the drivers door with the key. Many vehicles factory anti-theft systems can be reset this way.

Nothing worked for me

I have 2 keys. To 2008 ford escapes. And. The anti theft device is on so how do I turn it off with two keys I tried and it started once then the fast feet four days it has not started we tried and it's still not start we tried to trade it in did not work how do I turn it off so we can get back on the road with it we haven't drove in last week can you please tell me how turn off the anti-theft system in my 2008 Ford Escape