I need to install a basic numerical capatcha (nothing to bulky though) I have tried a few and i get the form to submit but it doesn't seem to check the capatcha to see if it is correct or not. Can any one help me please as I'm going crazy going around in circles.

The site is here (stripped out top of template for now to make it less confusing! and was also change to the .PHP extension when trying the capatcha's i tried):


I would ideally like it just above the submit button please.

Hope you can help
Many thanks