Perhaps the drainage hole is blocked?
If you pull the fridge away from the wall and look at the back, you should see under the cooling plate a drainage hole which should allow water to drain into a tray over the compressor, from where it is supposed to evaporate.
If the drainage hole is blocked, water will escape from the fridge to the floor.
Use a piece of wire to unblock the drainage hole.
Raaid, July 2012