midi port enabler

I can’t find any guidlines on how to configure the midi port enabler or ignore port filter. I am experiencing poofs on C5 my system is up to it and I am using a M-Audio firewire audiophile on XP pro. I can’t imagine that there is nothing in all the docs that I have , but I can’t find it. Please help

http://www.soundonsound.com/sos/dec07/articles/cubasetech_1207.htm

This article may help with how to use the ignoreportfilter, but with a focus on MIDI timing problems, not so much with “poof”. Hope it helps, though -

Thanks Alexis