Hi, I tried it now and we have not this problem. Code for image is generated but image is invisible.
Try to add this into style.less.css
.ait-portfolio .zoom img {
display: block;
}
or the full code for css into content of specific page.
[style type="text/css"]
.ait-portfolio .zoom img {
display: block;
}
[/style]

just replace [ ] with < >.
Have you the same problem if you insert portfolio on any other pages?

Regards, Ivan.

Check please if you have set right permissions to the theme folder. See here http://codex.wordpress.org/Changing_File_Permissions
It seems that there are problem with TimThumb, it is php script which works with images.
Please read also this about TimThumb problems.
http://www.thebuzzmedia.com/tip-for-timthumb-thumb-php-not-generating-thumbnails/

Regards

Hi, sorry about that, but theme works correctly. Functionality written in features works so there is no reason to payback.
Regards.

Hi, are you tried solution to solve timthumb problem as I said before?
I attached two images, as you can see the image was generated but is hidden for now.
First image, your image have set style display to none, second image, I change style to block through Firebug in mozilla firefox.
May I have an access to your admin and I'll try to look at it.
Regards, Ivan.

I think it's a coding issue. I downloaded the most recent version of TimThumb and made sure all permissions were correct but that didn't help. See the discussion at http://support.ait-themes.com/discussion/1737/problem-with-portfolios

Maybe it will give the developer a clue as to what's causing the problem ;-)