Security Caption Not Showing

I have just installed version 7.5 beta i have every thing installed and yet i can not get the security caption on join page to work has any one got a fix for this. PS i am new to boonex so try and be nice lol. do i need to install some thing else

Did you turn on Captcha in the administration section?

Tally

I'm sorry - maybe I am looking right at this but where in admin is this?  My captcha is broken also.

Rob

I can not find it any place does any one know where this is located

please check if GD php module is installed. Also check all files/folder permissions, especially related to security image folder.