Hi, I'm new. Lately I've tried to rewire Kontakt 5 and Sonar 8 Producer 32 bit after it failed in 64 bit. Anyway I'm using 64 bit OS. It works well, just a slightly issue. I use Vienna Symphonic Library triggered by midi controller through Kontakt but the performance is significantly reduced (less sample quality) compare to when I directly click to keyboard on the screen or put notation on staff. Any idea what's going on here? Thanks.

Is there a reason for rewiring instead of simply opening Kontakt as a VST?
I've thought there's a 64 bit version of Kontakt..
 
EDIT: Maybe I'm misunderstanding. Are you saying you're using 32 bit SONAR in 64 OS? So is Kontakt 64 or 32 bits?

Stupid me! Yes, it's a Vst. I didn't know what I'm talking about. I use Sibelius and Reason. That's why I need 32bit version of Sonar to get these things rewired. The stupid thing is I keep saying Kontakt as a rewire apps due its similarity to Reason. That's until I reinstall the 32bit Sonar and found out that I should look it into Vst folder instead rewire device folder! Haha. However, I still need 32bit Sonar.
 
So, It's a 32bit Kontakt. And I still can't figure out how to cope with this problem.
 
 

By the way, I don't load Vsl in library. I open it in database. Aside from that, Do you know how to set Kontakt back to default? Thanks

Kontakt was installed in 64bit windows 7 folder. It comes with two versions indeed, but the 32bit plugin is in the same folder with 64bit version of Kontakt. Is this effecting the performance?