difficulty with reproduction of MIDI score

I am having difficulty getting my E-W voices to play smoothly, using cubase 6.

I have attached a sample. To produce this sample, I opened a cubase file with two tracks on it. On one track I used Vienna Symphonic Library (piano) and on the other track I used EWQL Symphonic Library (piano).I used identical MIDI data for both tracks. The first track to be heard is VSL which reproduces the MIDI notes perfectly. The subsequent track, using EWQL, is reproduces the notes very unevenly (using any voice, not just piano). This effect becomes more pronounced when I increase the speed.

My Cubase is run on a computer with i7 processor and 24G ram. There were no other programs running at the time I made the file.

All help greatly appreciated.

VSL sample then E-W sample.mp3 (938 KB)

Sorry - I should have posted this problem on Cubase 6 Forum and have now done so.


My answer is in the Cubase 6 thread.