rapidly check
=>change the order:
m_pProcessComponent->setActive(true);
m_pAudioProcessor->setProcessing(true);
...
// process your audio
m_pAudioProcessor->process(..);
---
// when finished and you do not want to call any process any more
m_pAudioProcessor->setProcessing(false);
..
// want to disable the plug-in
m_pProcessComponent->setActive(false);
[/list]