This is how it tends to work in a lot of fanfiction communities. Not all of them work this way, but most of them do, especially in this fandom:
1. You have to actually be a well-known regular in the community to get reviews. That is, participate like none other, review, that sort of thing. It's okay to put a link to your fic in your sig, but if you don't post anywhere, then, yeah, you don't really get anywhere. As a note, sometimes, this doesn't work, too. I've been an established regular in the forums for a couple of years, and for four chapters of my main fic, no one commented.
In this sense, yeah, you have to review a lot, but you also should be participating a lot more in the FFL or other threads in the Writer's Lounge in general. If people accept you as part of the scenery, they see your stuff more often. And if you don't get attention for awhile, it's no big deal.
2. On that note, go make friends with people. The more friends you have in a community, the more people you can guilt-trip into reviewing for you. No, seriously. If you talk to a lot of people in private as well as in forums, you can connect with people. If you connect with people, they'll be more likely to want to see your stuff if you casually mention you're a writer.
3. Update on a fairly regular schedule. A few chapters a month reliably keeps your work on the front page, so more people will be able to see your stuff. Not only that, but also, it shows readers that you're serious about your fic and that they don't have to wait forever for a new chapter.
4. Wait awhile. Not everyone gets tons of reviews within the first couple of months they start posting in a writing community. Be patient and keep posting in the community, and eventually, you'll get some attention.
5. If all else fails, write really crappy or really awesome fanfiction. Either extreme tends to attract more people more than the middle-of-the-line stuff or even stuff that's only a little bad or a little good. Yeah, this part is blunt, but people tend to either get attracted to something lots of people already say is good (such as Dragonfree's fics) or something that's guaranteed to cause some lulz due to how bad it is (such as Half-Life: Full Life Consequences). If you want good attention, though, word-of-mouth advertising isn't that bad.
Of course, it also helps to format your stories in a way that's easily readable, as D said. As it stands, I've glanced at your work, and at times, it is like a wall of text, which is difficult for me because I don't have great eyesight. Remember to hit the enter button twice when starting a new paragraph.
Good luck and hope that helps a little.