Your symptoms are contradictory. On the one hand you say the messages are not detected by RS-Met Midimonitor VST and that synths are not responding to them, but on the other hand you describe symptoms of synths responding, but not responding correctly.
All in all, it sounds a little bit like what happens when you have a keyboard that sends All Notes Off (CC123) when the last key is released. Some synths don't handle this message properly in conjunction with CC64 which should override All Notes Off. Dim Pro and most NI synths are among these. This is a synth-programming problem, not a SONAR problem, and can only be addressed by filtering out the offending CC123 messages or stopping them from being sent if your keyboard allows it.
Let us know what controller you're using, and whether any of the monitors show it's sending CC123.
My only other thought is something is up with the way the Fatar pedals are configured or connected.
EDIT: Ah, I see it's the Fatar Studiologic VMK-188+. I'll check it out.
EDIT 2: Found nothing yet about CC123, but this statement in an SOS review suggests the Fatar offers many possibilities for setting up pedals/functions incorrectly:
" The VMK188 has three pedal/foot controller inputs (more than some master keyboards at around this spec/price point) and these have the same five parameters as the sliders and knobs. Here the Polarity setting is particularly useful, and could be used to deliberately invert one pedal but not another. The inputs are all freely assignable; personally, I prefer to have one 'hard-wired' to sustain-pedal duties, but it doesn't take too long to program this into your patches. "
post edited by brundlefly - 2011/12/29 10:37:36