more than likely 2 possibilities
either an incorrect setting in parameters
or an incorrect control logic card

i'm banking on improper settings, not totally ruling out an incorrect card type because it is always possible but if you ordered the part using serial number of the truck you should have gotten the correct card.

these cards are not setup totally when new, most of the settings will work when plugged in from the factory but you still need to go into the programming and insure all settings are correct for the truck model and system that is on the truck.

There should be a dip switch(sw1) on the logic that has to be set correctly for either chopper control or contactor control hydraulics. This should have been your first thing to set before installing the new card.

you WILL need a service manual to go through this ;o)