We seem to be having a problem with the image gallery: http://www.trade2win.com/gallery/ - and it appears that at the moment it's not possible to post an image. I wasn't aware this was the case until you asked the question, so we'll try and get it fixed tonight - otherwise by tomorrow.
No we hadn't yet fixed it at the time you tried it, but if you try again now it should work okay. Basically the problem before was that you needed to login again to this section of the site even though you were already logged in to the site via the front page/forum pages. Now the two logins are merged correctly, so all you need to do is navigate to the gallery page here: http://www.trade2win.com/gallery/ and the click the link to "Upload Images".
Look forward to seeing your pictures, and other members who decide to upload theirs - the gallery has the potential for being a very useful visual resource but currently it's fairly neglected area of the site. I hope to find ways in the future to encourage more participation in it - and as welcome members feedback in achieving this aim.