I got in touch with Michael, he is indeed super kind fellow, he even went through my settings via TeamViewer! Founding nothing unusual with my software we agreed that the occasion when parallel workflow worked for me was probably just some kind of software glitch..
Parallel Workflow is available for iQsmart2 but the bundle costs 1,599 + VAT. iQsmart1 version goes for 299 + VAT at www.cpsnet.co.uk