Hej guys! I may be just *, but could anyone explain me how can I post an image to a thread?

I created one thread with a fanart image before the forum got updated and the image got deleted from the thread. I tried to edit that threat by uploading the file again but I have a problem.When I create a thread, there is an icon which allow to post image directly into the thread (by dragging the file from desktop or typing file name) but the problem is that when I do it, nothing is happening. I don't see my image, I can't add a description to it, like I did before the forum gets updated. But I also don't get any notification about site error/file to big, just nothing.I don't know what's going on

edit: OK DEOESN'T MATTER ANYMORE I'm just * please ignore this >///< I figured out the new forum accept just .jpg files and mine all was in .png SHAME ON ME sorry guys ;-;