You can check the pump for a object blocking it. The cover is under the plinth plate on the front of the machine. The details are in the manual.
http://imagebank.indesitcompany.co.uk/brochures_online/pdf/indesit/Laundry/WD11.pdf
If there is no objects in the pump, you have to call service to come and repair it. When the dial is spinning, the main power light will flash a certain number of times. Tell the service people how many times it's flashing they will know what/if parts are required.
pseudo
June 2009