Sounds Like you need to clear the fillter out . If the machine go's into a spin, full or part full of water it will make the machine spin violently. A QUICK TEST With the machine empty of clothes:- put the cycle on to a rinse (picture of a shower head) let it fill up and then rotate the cycle to a spin (swirly line) it should empty within 20 sec's.
To get to the fillter you''l need to isolate both the elect' & water and removed the rear lower pannel.
you'll find a black "L" Shaped hose attached to both the drum & pump take that off to find if anything is blocking it.
Dee Jay
March 2006