the hydraulics are not tied into the drive circuit so they will work independently

like kevin says, check all your fuses, make sure none are blown, remove them from thier sockets and check with ohm meter to make sure they are ok. Check for a seat switch and make sure it is making, if it is not then it will not drive.
all ev100 systems have a code system when something fails, check the hour meter display when you press the accelerator pedal and see if there are any codes comming up.
you say the ev100 card is new? did you replace it? did you set it up afterwards with clarks settings? they do not come preset, you have to do it with the ev100 handset or gesentry and a pc.

there is a strong possibility that the card settings are wrong

let us know something so we can help narrow it down further