Hello.
I am not sure if there is any support for this mod , but here , i give it a try .
I downloaded the mod from zen cart site.( 1.38x)
installation was ok for contact up page. captcha showing up , i can redraw , but i don't need to enter validation to send email .. went through all the post , some had the same problem but no cure ..

if i leave all the text field blank on contact us and submit , i see warning massage relating to all fields including captcha .. thats all .
I tried captch_test.php, and there everything works.

any idea why validation wont required ?

thanks.