Notes freeze when pressing the sustain

Hi everyone! I am having an issue where when i play a few notes and use the sustain pedal as well…some notes get stuck.

This happens only with the cubase vst’s ( padshop etc) … i am using different vst’s as well but i dont have this problem…

So what do i have to do?? I am using cubase artist 7.5

Problem solved by enabling system timestamp for windows and direct music inputs in the device setup…

Anybody know the MAC fix for this? It’s a bummer.