Do VST's Work?

[gilligandavis]

Has anyone been able to get a reverb VST to work on an instrument track?
I have instrument tracks working fine, and Jamtracks working fine, but when I add a reverb (or any other) VST to an instrument track it makes no difference. 
You can hear no reverb at all.
I've seen "rumors" of 32 bit VST's only, but still no luck even with one of those.

If someone has one working, which one?
Was there something special you had to do?
Again, I can add the VST fine; the VST control panel comes up like it should; you can change presets, etc.
It just doesn't do anything to the sound!

Thanks.

Yes, I've been able to use my Waves Abbey Road reverb fur bug voice and on keys... And Guitar Rig on my guitar... No luck , however, with my Lounge Lizard midi keys.