I have tried all the tricks and the propelars are on correctly and spin, but it will not lift up and fly?
Do I need to go back to the old firmare? I updated to firmare 4.0

Did you do a compass calibration?
Did you do a IMU calibration?

What model?
What have you done to prepare it for flight?
"the propelars are on correctly and spin, but it will not lift up and fly? "

When you do CSC, the props spin but then no response when using left stick up?

Explain