Ok what you need to do is confirm you have 240v going to the pump when you set it to drain.
If you do have 240v then its a pump fault.
If you dont then the control board will be the problem as the pump gets its feed direct from the control board.
So if the old pump was burnt out then its proberly take 1 of the compoments out on the board so this will be why its not bringing the drain pump on.
Im afraid its a compelete new control board unless you are good on electronics and can find the faulty part.
But thats something we dont go down to is compoment level. We just replace the control board.
Ok just had a look around and ive found it on this site here.
Click here for the part.