damit damit damit!, lawl flash uploading

i have a problem uploading the flashes, after i download them, i try to upload them to the swfup site, but then it says its not in swf format, but it is

when i download the flash it has the same symbol as my windows media player, i think in there lies the problem, i dono what it is, but i no its in swf format!

if any admins or mods were to be so kind to make a guide too, cause i also wanna know the size length and height u used to upload urs

There might be a file size restriction, so try not uploading anything too big. PM me if you have any problems beyond that.

And I have no idea how to find the exact height and width of a .swf outside of opening it in flash, but I know some only work if they are the proper size.