Don't feel too discouraged. You had a lucid dream, that's something to be happy about!

Sometimes dream control takes a little practice. Before your next lucid, take a look at this flying tutorial and remember a few methods you can try. http://www.dreamviews.com/community/...ad.php?t=62542

It also helps if you jump from up high, at least ten or twenty feet up. That way you'll already be in the air and you can just work on staying up there.

Above all, keep trying, keep practicing and believe you can do it.