there are springs in the mechanism that release the latch to the trunk that are connected to the lever inside the car.
check the lines from the lever to the hatch, you will find one that has been disconnected. you might have to pull one of the springs over the notch where it should be connected. your cable may have become detached from the lever as well.
i took mine apart, so that i can only open my trunk with the key. keeps things in there safe and sound... for the most part