Bobcat 753 Can't lower or tilt up bucket

I have a 753 that wont lower or allow me to tilt up the bucket. I can "bleed off" the pressure to lower the arms with the red knobbed relief valve but can't get the bucket to tilt up. The BICS indicators are all showing green with no blinking lights. When you push the green button you hear the brake solenoid "clunk" but the bucket stays up. The operating controls don't, can't relieve the fluid. Could it be the lockout solenoid not operating properly? Any help would be greatly appreciated.
Thank You,
Larry in East China Mi.

Bobcat 753 Can't lower or tilt up bucket