The movie begins with a man (the acter is Will Smith) and his son. He is a normal guy with his own problems but suddenly he gets fired and loses his own home and doesn't know how to survive. But later he is getting back in the normal lifestyle and eventually starts his own company, then he sels it for a millions of dollars.
please can you help me?

Sounds like "The pursuit of Happyness"

The Pursuit of Happyness (2006) (http://www.imdb.com/title/tt0454921/)

Sorry cats, I can't give you a greenie yet but Yes definitely pursuit of happiness. He sells machines and that about breaks him and then he gets an internship at a stock broker and eventually becomes rich and has his own company later on in life and sells it for a million dollars. It is a true story and a great inspiring one.

Sounds like "The pursuit of Happyness"

The Pursuit of Happyness (2006) (http://www.imdb.com/title/tt0454921/)

Thank you very much

Xan-Kriegor agrees : Thanks I owe you

Nah, that's what this site's all about.

What your describing sounds like Pursuit of Happiness

What your describing sounds like Pursuit of Happiness

Look at the answers above, it is what was being described.

Pursuit of Happiness