SF2 Volume?

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Question, if I may: Is there any way to change an SF2 instrument's volume? I see the option at the bottom of the Piano Roll, but the volume never seems to change unless it's all the way at the bottom (i.e. muted). During playback, all notes use the same volume. This doesn't seem to be the case for the samples that came with the program, but none of my SF2 files seem to work. Am I missing something?

Thanks, hopefully someone knows the answer.
what lmms?
i tested 1.0.2, and it works fine with sf and velosity-sticks in pianoroll.
I could also be the sf that you have ( it is?)
I tested with generalUser-sf

(Does aoe know of this problem?
Hey, thanks for the response!

I have v.1.0.2, but I've noticed the bug on 1.0.1 and 1.0.0 before I had updated both times as well. My OS is Windows 7 64 bit, for what it's worth. My SF2 files are from all over the internet, including collections of misc. instruments and some from video games as well. The volume doesn't seem to work on any of them. Can you tell me where this 'generalUser-sf' is so I can test it on my end?

Some sites I had grabbed SF2 files from:

http://hammersound.net/cgi-bin/soundlink.pl
http://www.newgrounds.com/bbs/topic/1200140
http://www.vgmusic.com/~lunar/soundfonts/