There’s been some module repository issues lately, due to a problem with sourceforge (where it’s normally hosted). Jamie has been in the process of migrating that to another server. I suspect the issue here is that the migration isn’t complete yet… try it again after a day or so and see if it works better then. In the meantime, you may just need to do it manually.
As far as why it doesn’t show up in the modules list once you install it – take a look in the Un-Used Modules list, do you see it there? That may just mean that the FTP software needs to be configured first.