Once you ran the test, there should be a "Save to desktop" button. Once you clicked that, it should save the result on the desktop. Once it did that, you go to the A3 submit page and upload it there.
Btw, I tried briefly the 2.51-2.52 versions, but they don't work. I also had to get the MSVCP100.dll and MSVCR100.dll files, but even after that, when I start the wrapper, the page just dies. If I close the wrapper, the bench starts, but after it runs, I see no score. 2.26 is still OK. Will give 2.53 a try.
Hungarian XP SP3, i5 2500K rig, tried both ATI/Nvidia cards.