[Hamsterita]

What's the problem exactly?

You could try to upload them directly to the forum, but to do that you need to resize them, and the process is more complicated in my opinion. You need to click in "go advanced" then in the paper clip that will appear at the top of the window where you write the posts. A pop up will emerge, you need to upload the image by selecting it from your pc clicking in the "choose file" button and then click on "upload".

If you want to see the pic embedded in the post, if you use that method then you need to do all that, and then click on the paper clip again, this time the attachments will appear and you just need to select them.

You could try to attach them from a website too clicking in "go advanced" then in the paper clip that will appear at the top of the window where you write the posts. A pop up will emerge, and then you paste the url under where it says "upload an image from a url"