i used imageshack to upload pictures of my city, and they worked for a while, but now i can't see any of them. is there a reason they wouldn't be working?

http://www.skyscrapercity.com/showthread.php?t=166362

I think they work only for 15 days, or something like this, I'm not really sure

i put them up last week though. seems strange. is there a place that will let me put them up without shrinking them down or deleting them after a few days?