Since I upgraded Sonar Studio to version X3e (from X3b), my OP-X ProII VST synth can't (manually) load banks or programs. The dialog window appear but if select a file and click Load, nothing happens. And if I load an existing project, it loads the correct bank but always defaults to patch 1 in the bank. Anyone else had any problems, or anyone got any ideas?  Have reported this to SonicProjects (who told me to speak to Cakewalk) and Cakewalk (who haven't responded).  Annoying since the one VST I actually paid money for won't work.

I am having the same problem sort of. I have Professional and OPX Pro II worked fine on 6/3 all day and then today it quit working correctly and I got a bunch of crackling as well. Only thing I can guess is that something updated and it doesn't sync up right. I checked the interface driver, but that doesn't seem to be it. I looked at all advanced areas and buffering...nothing. I have a good pc and like I said...one day was working great and I had 5 synths running w/no prob...next day...problem after problem. Any solutions?