Captcha image not showing?

[eluser]chefnelone[/eluser]
Hello,

This is really odd.

I have a captcha image in a form which was working fine until today.
But now the captcha image doesn't show up.

The captcha folder has permissios set to: 777


There are NO error messages, nothing. I linked 4 screenshots pictures to show what I see:

This one shows the missing image in the web, I used Firebug to spot the missing image:
http://img257.imageshack.us/img257/4944/17352714.jpg

This shows that the image is in the correct remote folder. Then the image is there!
http://img228.imageshack.us/img228/7407/81645404.jpg

This show the permission of the image, which is 640
http://img839.imageshack.us/img839/7403/...3at100.jpg

And this one shows that image is correctly saved in the database table: 'captcha'
http://img228.imageshack.us/img228/3650/38958356.jpg



I checked everything but I can see what the problem is.
Any help please?