Hi. I am having a issue with a security system in my car. It is a 1999 Tiburon SE

The system i have is kinda proprietary. There is a blinking light that needs to be off for me to start the car.

To start my car I need to turn the ignition halfway and press the passenger side window button up, which deactivates the light, then the car will start. However i tried starting it today and the light will not turn off. I tried disconnecting the battery and removed all the fuses and still nothing.

Any solutions would be greatly appreciated. Thanks.