I use Native Instruments Bandstand, and I wanna replace some instruments with instruments from other sample-libraries (for example from a sf2-file).

I have used a tool "Extreme Sample converter" to convert the instrument from the sf2 to nki (Kontakt)...
It's working, but if I play some MIDI-files in bandstand there I can hear some "hanging sounds", false notes etc. and its not working properly...

Can someone explain me, how I can convert a soundfont (sf2) bank correctly to a Bandstand-Library?

best regrads