Need help bad, problem with images not working

[shibby2]

Hey everyone, just wondering if you could help me out here. I really need to figure this out because no one can join my forum currently.

All of a sudden there is a problem with images being displayed on my forum. Certain members' avatars don't show (not all), and sometimes image attachments won't upload and will be just blank. But also the human verification image shows up as a red X (broken image) on the register page. If I turn off human verification, I'm instantly spammed with hundred of spambots joining.

Here is a couple screenshots of what's happening with the avatars. The first screenshot is from the 'members list' page. You can see where it shows two members' avatars, but the other is just text that says "insertusername's avatar." The other screenshot is from a post, and you can see it says the same under their name where the avatar normally would be, but this time it's a hyperlink, and directs to the member's profile.

Any idea what is going on here? I didn't change anything on my forum, it just started doing this one day. Could it be something that the webhost did?

Any help is GREATLY appreciated, thanks! :up: