I also have that ProLog Express BS for my cable connection (which is a one-way cable connection, mind you), but through Service Electric Cable TV & Communications in Milford, NJ. Throughout my time with this connection since June 2005, I have had nothing but problems. Because I don't feel like typing all of it again, I'll just summarize. Basically, the modem woudl always kick off the Internet from 5:00 PM until the morning the next day, every day. It took them about two months to replace our modem, which worked for about a week until they had to replace the modem once more, with an even older model (mind you, the "new" ones were from 1999). This actually worked for about six months, but them gave us similar problems of not being able to keep a stable connection. Basically, it took until about another month for them to actually come to my house and play around with their wiring until they got it to work. And since then, it has mostly been working.
Recently, I had another tech come to my house to explain our crappy cable TV feed (like it always is), and he just gave us the same mantra -- they're working on it. I don't know how much of this is the truth, but apparently they are installing digital simulcasts for every channel, then we will get HDTV and two-way cable Internet. However, we were supposed to get two-way back in 2001. Oh, and throughout all this, both ProLog and Service Electric lied to us over the phone, never called us back when they said they would, and whenever we called supervisors, we would get his/her voicemail and never a returned call. Basically, these companies absolutely suck and if it were possible, I would completely cleanse myself of them and get Verizon for Internet and TV (IPTV w00t), but alas, giving us DSL and whatnot might hurt their bottom line, so here we are, stuck using seven+ year old modems and ancient unreliable cable and phone lines for Internet access, waiting for the promised day of getting technologies that are now five years old at least.
I understand your pain, VenomXTF.