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When the security light is solid it means it can't read the chip in the key, or it see's a key that was not programmed to the car
Do you have another key you can try
No I do not have another key
Inspect the key
and make sure the chip is still in your key.
If it is, I have one thing you can try
I do not see a chip where do I look?
When you look at the key, This is where the chip is located
Yes the chip is there
ok, then lets try to get the car out of lock mode
If that doesn't work, then the key will need to be reprogrammed to the car I am afraid
If you have any more questions on this, please feel free to ask.
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