[About Volume Slider]
I imported a midi file to the RB 2011. When I started playback, it does not show volume changes at all. I checked with Piano Roll that velocities change in the midi file. However, as I already mentioned, volume slider does not change at all during playback.

Piano Roll Window Overview (PGMusic help)

The Piano Roll window enables precise graphic editing of note timing and duration. You can also graphically edit Note Velocity, Controllers, Program Changes, Channel Aftertouch, or Pitch Bend.

Ofcourse RB is meant to be used with the RealTracks, but very same volume slider changes shall be shown to the audio tracks too.

[About Realband Effects]
What additional effects do you use? PGMusic provides the following effects. PGMusic says, that you can download other effects too.

PGAutoWah
PGDistortion
PGDynamics
PGEchoChorus
PGFiveBandEQ
PGFlanger
PGPeakLimit
PGReverb
PGRingMod
PGTenBandEQ
PGTremolo
PGVinyl
PGVocalRemover
PG_RTA

Thank you for your time
B