well, with geocities as your host, you probably exceeded maximum bandwidth, or they took it down because they don't like you hosting pictures for other sites instead of just geocities.
try finding another host. look in the artwork forum, I believe they've got a sticky full of image hosts in there. Also you can try searching for "free image hosts" on google
anyways, next time, do what MyStiX said, instead of making a thread. if it doesn't work in the preview, it isn't likely to work in the forum