Aweber formnot working

Im having trouble with my Aweber web form, it doesnt work.
I spoke to Aweber on the phone and they reckon its running but not directing into the right place.

Apparently I need to enter this code but I dont know where???:

<input type=”hidden” name=”redirect” value=”http://www.aweber.com/thankyou-coi.htm?m=text&#8221; id=”redirect_3cc534081df419bfa7f4a3adf7b148ff” />

please help!?

Heres my site: http://www.differentclassradio.co.uk

thanks
Liam