How to post an image from imgur.com

[paraemuladores]

Hi there. I'm trying to make a very long post with a lot of images, that are necessary to understand the question of the post. I'm trying to post the images from imgur.com, but to any option I choose, when I'm going to post the thread, it shows me the message:

Please correct the following errors before continuing:
You cannot post clickable links to this forum threads and posts.

And, if I upload the images as attachments, they don't show when I make the preview of the post. How can I show images in the posts?

Edit:

Hardware Specs:

Processor: Intel Core2 Quad Q6600 2.4 Ghz
RAM: 4 GB single channel
Motherboard: Intel DP35DP
Graphics Card: MSI Nvidia N560GTX