Turns over but will not start

When you are cranking the engine over is the security light flashing? if so we need to disarm the security system. here is a guide to help:

https://www.2carpros.com/articles/how-to-reset-a-security-system

This guide can help as well:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down these guides and report back.