CodeIgniter 2.0.2 CAPTCHA help / Tutorial?

[eluser]NordicElf[/eluser]
Aaarrggghhh me again. this time deploying to the server and it's returning false again.

I just can't see what I'm doing wrong.

Code:

array(6) { ["img_path"]=> string(49) "/usr/www/users/xxxx/public_html/snaps/captcha" ["img_url"]=> string(44) "http://domain.com/snaps/captcha" ["img_width"]=> string(3) "200" ["img_height"]=> int(30) ["border"]=> int(0) ["expiration"]=> int(7200) }

I'm not specifying fonts - just letting it use the ugly gd ones.
I've triple checked permissions and the folders are definitely there!
Server is running 5.3.3 on linux. Gd is installed and enabled.

any ideas?