Volume not working

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So I'm making a song. But when I set my systems volume to it's normal level(so everything I play on my computer sounds good and loud), and then I play my track, it's super quiet. This is kinda frusturating since I have the master volume set up as far as it can go without clipping in LMMS. And I'm not sure how to make it any louder.
Compression.

Start here for basics: http://en.wikipedia.org/wiki/Dynamic_range_compression
amplifier in effects