Are you running a firewall or not?
But slow is different from can't. A firewall blocks. Slowness is the site. Usually. Opening other ports will not increase speed, it just doesn't work that way.
my torrent downloads are very very slow I need to open up ports on my modem/router to download faster. I accessed it via browser (10.0.0.138) but I cant find it. Here is the screen shot of it:
I use uTorrent as torrent software and here is what is says: