Ok, seeing as no-one's coming back on this and I'm not personally au faite with this particular machine, a little general info to get you started.
The water level sytem works on the basis of the displacement of air, so there is a level switch (usually round), a skinny connecting hose, which in turn runs back to an air chamber. This and occasionally the hose can choke with food detritus.
You need to be able to access under the machine (Awkward - this is an integrated one, yes?) and find the level switch. Usually round in design with 3 or 6 terminals and the aforementioned skinny hose. Follow this back and the point at which it joins on is the collecting chamber. This may be a part of the sump (the area where the filters fit in the base), a fill matrix on the side of the machine, or occasionally a separate chamber attached to one of the hoses under the machine. Anyway, it needs to be cleaned out of any deposits, as the reduction in volume of the chamber affects the displacement of air and can cause flooding.
Power off of course before attempting any of the above.
If you are not confident, check Repairs@ or Directories for a UKW repairer in your area.
Which bit of "Unplug it" is causing the problem?
Stop eMailing me. This is a perfectly good forum - use it!