Pontiac Firebird Turn Signal Stay On

I Have Just Changed The Flasher Unit On The Car Cause My Blinkers Wernt Blinking, They Where Just Staying On, And I Got Them To Blink, But...

My Blinkers Stay On. I'm Not Sure Why They Don't Flash. I've Checked The Fuse (it's In Good Condition), The Hazards And Brake Lights Work...