My laptop does not want to charge

Hello,
My name is marie and i have a d610 dell laptop, but im kind of having trouble with it because it does not want to charge... i have it charging since tuesday night but it still has the green and red flashing light and when i do take it out the charger the laptop dont turn on at all... please i need help i got it as a gift and i dont want it to mess up... Email me back and let me know whats causing this... thankz so much