hi I am new to this site, having probs with my suspension will not go up ( stuck on its bump stops ), there are no warnings on dash, and light just flash,s on the switch, I have just changed the valve-block and driver unit, air bags are only 18,mths old , it was working fine going up and down like it should but went down over night was told to change valve block, please help, and if someone knows anyone in the Birmingham area who can fix this prob would be much appreciated thanks to all