The bottom plate on the control valve... I'm assuming this is the port plate the spool valves bolt to?
And you fixed it by replacing it?
If so, pull the plate back off and compare it with the original one. Carefully examine where each port goes. There are different configurations depending on the application. They look the same from the outside but are drilled differently internally. Also some can be installed backward, most can't but some can.
Also check your line connections. The P port is oil pressure coming from the pump.
The T port is return to tank.
The A port goes to one end of a cylinder or set of cylinders.
The B port goes to the other end of the same cylinder or set of cylinders