The flash series on Newgrounds? Looks like the last episode (ep 8) came out in 2009 and the artist hasn't done any sprite animations since. They probably just moved on, with a bit of Googling I found out they now have a graphic novel/webcomic series called Codex Black that's published by IDW. Tho I mean, if you reeaally need to find out their reason for not continuing a fan animation series (the reason just seems to be them moving on, simple as that), you might as well
contact them or something.