Problem with Indesit W123s Washing Machine?

Hi - I use number 4 cycle but as soon as it gets to the drain bit it just keeps clicking around the clock and I have tried to turn it off and start again but it just keeps clicking. Eventually got it to stop clicking but the water wont drain. We keep having this problem and it seems to be down to the rinsing/water draining. The start of the cycle is fine as it still spins its just the water wont drain! Can anyone help? Have a ton of baby clothes to wash!