Car Alarms: Car alaram /remote Camry 99, valet mode, dash area

Question
I have camry 99 model, it has anti theft alarm system. since i purchased it is working fine. but yesterday I locked my car as usual but today when i am unlocking the car it is not responding. I thought i have weak battery in my remote. I opened the car remote with key, alarm went off. I tried to start the car it does not start. I replaced the remote battery of remote, but it is still not responding to the remote. I read the manual of remote it is mentioned, I need put my key in the start position and push the RED LED Button inside I  did several times but still no success, I my still not starting when ever I opening the door alarm still buzzing off.
Please help how resolve this problem
Thanks,,,,,,,,,please respond

Answer
It's likely to be an after market system.

To try to disarm it,
look under the dash area for a button or,
a toggle switch. When you locate it, turn on the
ignition key, press and hold in the button (little
spring loaded micro button, red or black possibly)
until the alarm chirps 1 time. This should over ride
the system, and only the keyless entry part,
if installed, would still be operating.
The LED (light emiting diode) light in the dash
should also go on solid.=VALET/OVERIDE

This stops the alarm except for the keyless
entry if installed. Once in Valet mode,
it will allow the car to start and operate
like there was no alarm at all.

The next step is to remove the alarm.
This might require a local technician to
identify it, and affect neccesary service for you.

That should solve the troubles.

Let me know what you discover.

ALARMTEK
CARALARMMAN.COM